Data Analysis Foundations with Python. Master Data Analysis with Python: From Basics to Advanced Techniques

Cuantum Technologies LLC

Embark on a comprehensive journey through data analysis with Python. Begin with an introduction to data analysis and Python, setting a strong foundation before delving into Python programming basics. Learn to set up your data analysis environment, ensuring you have the necessary tools and libraries at your fingertips. As you progress, gain proficiency in NumPy for numerical operations and Pandas for data manipulation, mastering the skills to handle and transform data efficiently.Proceed to data visualization with Matplotlib and Seaborn, where you'll create insightful visualizations to uncover patterns and trends. Understand the core principles of exploratory data analysis (EDA) and data preprocessing, preparing your data for robust analysis. Explore probability theory and hypothesis testing to make data-driven conclusions and get introduced to the fundamentals of machine learning. Delve into supervised and unsupervised learning techniques, laying the groundwork for predictive modeling.To solidify your knowledge, engage with two practical case studies: sales data analysis and social media sentiment analysis. These real-world applications will demonstrate best practices and provide valuable tips for your data analysis projects.

Kali Linux Network Scanning Cookbook. Over 90 hands-on recipes explaining how to leverage custom scripts, and integrated tools in Kali Linux to effectively master network scanning

Justin Hutchens, Justin Hutchens

HBase Essentials. A practical guide to realizing the seamless potential of storing and managing high-volume, high-velocity data quickly and painlessly with HBase

Nishant Garg

C++20 STL Cookbook. Leverage the latest features of the STL to solve real-world problems

Bill Weinman

Fast, efficient, and flexible, the C++ programming language has come a long way and is used in every area of the industry to solve many problems. The latest version C++20 will see programmers change the way they code as it brings a whole array of features enabling the quick deployment of applications. This book will get you up and running with using the STL in the best way possible.Beginning with new language features in C++20, this book will help you understand the language's mechanics and library features and offer insights into how they work. Unlike other books, the C++20 STL Cookbook takes an implementation-specific, problem-solution approach that will help you overcome hurdles quickly. You'll learn core STL concepts, such as containers, algorithms, utility classes, lambda expressions, iterators, and more, while working on real-world recipes. This book is a reference guide for using the C++ STL with its latest capabilities and exploring the cutting-edge features in functional programming and lambda expressions.By the end of the book C++20 book, you'll be able to leverage the latest C++ features and save time and effort while solving tasks elegantly using the STL.

The SketchUp Handbook for Interior Design. A step-by-step visual approach to planning, designing, and presenting interior spaces

Rebecca Terpstra, Dana Hoffman

Design professionals often find it hard to help their clients visualize their unique concepts and visions. Luckily, SketchUp bridges this communication gap with a powerful set of tools for visualizing and presenting your design ideas. This book teaches the approach perfected by two successful interior designers who have mastered SketchUp Pro/Studio to generate a workflow that produces fascinating designs and enables you to communicate them through vivid illustrations.Starting with a review of the basics of creating 3D models, this book introduces Becca’s Hierarchy of Modeling—a ten-step process that establishes a rhythmic pattern in your workflow. As you progress, you’ll build on your SketchUp Pro knowledge by constructing architectural elements of a commercial building and furnishing a residential room with your own furniture, fixtures, and equipment (FFE) from scratch. From infusing photorealism into models to crafting appealing client presentations using SketchUp LayOut, this book has you covered. Each chapter provides step-by-step explanations of essential concepts and practical examples to reinforce learning.By the end of this book, you’ll have an advanced understanding of SketchUp Pro’s capabilities, ensuring you enjoy working on conceptual or full design projects from start to finish and showing off your design prowess.

Core Data iOS Essentials. Knowing Core Data gives you the option of creating data-driven iOS apps, and this book is the perfect way to learn as it takes you through the process of creating an actual app with hands-on instructions

Bintu Harwani, B. M. Harwani

Core Data is the essential ingredient in data driven iOS apps. It's used for storing, retrieving, and manipulating application data in databases, XML, and binary formats. It's an essential component for iPhone, iPod Touch, and iPad apps.Core Data Essentials provides a clear, readable guide to the most useful aspects of Core Data. Built around a realistic example app, the book showcases the most important aspects of Core Data development in the context of a complete, functioning app written in Objective C.The book starts with a tour of how the app works. Then you'll see how to easily display data using the Table View. You'll learn how to develop an appropriate data model that fits the needs of your app, then implement that model as updatable data objects. You'll see how to update data and build relationships between objects and learn how Core Data can work with search, and how to provide your users with friendly data editing features.

Building Games with Flutter. The ultimate guide to creating multiplatform games using the Flame engine in Flutter 3

Paul Teale

With its powerful tools and quick implementation capabilities, Flutter provides a new way to build scalable cross-platform apps. In this book, you'll learn how to build on your knowledge and use Flutter as the foundation for creating games.This game development book takes a hands-on approach to building a complete game from scratch. You'll see how to get started with the Flame library and build a simple animated example to test Flame. You'll then discover how to organize and load images and audio in your Flutter game. As you advance, you'll gain insights into the game loop and set it up for fast and efficient processing. The book also guides you in using Tiled to create maps, add sprites to the maps that the player can interact with, and see how to use tilemap collision to create paths for a player to walk on. Finally, you'll learn how to make enemies more intelligent with artificial intelligence (AI).By the end of the book, you'll have gained the confidence to build fun multiplatform games with Flutter.

Blazor WebAssembly by Example. A project-based guide to building web apps with .NET, Blazor WebAssembly, and C#

Toi B. Wright, Scott Hanselman

Blazor WebAssembly makes it possible to run C# code on the browser instead of having to use JavaScript, and does not rely on plugins or add-ons. The only technical requirement for using Blazor WebAssembly is a browser that supports WebAssembly, which, as of today, all modern browsers do. Blazor WebAssembly by Example is a project-based guide for learning how to build single-page web applications using the Blazor WebAssembly framework. This book emphasizes the practical over the theoretical by providing detailed step-by-step instructions for each project.You'll start by building simple standalone web applications and progress to developing more advanced hosted web applications with SQL Server backends. Each project covers a different aspect of the Blazor WebAssembly ecosystem, such as Razor components, JavaScript interop, event handling, application state, and dependency injection. The book is designed in such a way that you can complete the projects in any order.By the end of this book, you will have experience building a wide variety of single-page web applications with .NET, Blazor WebAssembly, and C#.

IT Inventory and Resource Management with OCS Inventory NG 1.02. Eliminate inventorying dilemmas by implementing a free and feasible IT Inventory solution

Barzan Antal Tony (Euro), Barzan "Tony" Antal, Pierre Lemmet

OCS Inventory NG is a cross-platform, open-source inventory and asset management solution. It brings more than plentiful features to the table to satisfy the business needs of small-to-large organizations with up to tens of thousands of computers. However, to put this inventory solution to optimum use requires a lot of skill.This book will lead you through the steps of implementing OCS-NG until you master working with it. This book aims at reducing efforts involved in resource management. The solution gives a robust foundation on top of which we can implement other third party applications, plugins, and much more.This book begins with the basics—it explains what IT inventorying needs are to be met in the real-world. Then, it covers a step-by-step approach to everything you need to know to set up and implement OCS-NG as a centralized inventory solution to meet all these requirements. It delves deeper into carrying out inventory tasks with every chapter.You will learn how to choose the best agent type and deployment method. We discuss the process of gathering inventory data and cover techniques for creating and deploying packages. You will also learn how to acquire added benefits with the use of plugins. We discuss best practices on inventorying and troubleshooting agent-related problems. The book presents real-world inventorying scenarios along with their solutions. You will basically learn how to use OCS-NG to get the most out of it.As a conclusion, if you want to learn about a free solution that fulfils inventorying necessities of the real-world, this is the book for you.

Linux Kernel Programming. A comprehensive and practical guide to kernel internals, writing modules, and kernel synchronization - Second Edition

Kaiwan N. Billimoria

The 2nd Edition of Linux Kernel Programming is an updated, comprehensive guide for new programmers to the Linux kernel. This book uses the recent 6.1 Long-Term Support (LTS) Linux kernel series, which will be maintained until Dec 2026, and also delves into its many new features. Further, the Civil Infrastructure Project has pledged to maintain and support this 6.1 Super LTS (SLTS) kernel right until August 2033, keeping this book valid for years to come!You’ll begin this exciting journey by learning how to build the kernel from source. In a step by step manner, you will then learn how to write your first kernel module by leveraging the kernel’s powerful Loadable Kernel Module (LKM) framework. With this foundation, you will delve into key kernel internals topics including Linux kernel architecture, memory management, and CPU (task) scheduling. You’ll finish with understanding the deep issues of concurrency, and gain insight into how they can be addressed with various synchronization/locking technologies (e.g., mutexes, spinlocks, atomic/refcount operators, rw-spinlocks and even lock-free technologies such as per-CPU and RCU).By the end of this book, you’ll have a much better understanding of the fundamentals of writing the Linux kernel and kernel module code that can straight away be used in real-world projects and products.

Hack the Cybersecurity Interview. A complete interview preparation guide for jumpstarting your cybersecurity career

Ken Underhill, Christophe Foulon, Tia Hopkins, Mari Galloway

This book is a comprehensive guide that helps both entry-level and experienced cybersecurity professionals prepare for interviews in a wide variety of career areas.Complete with the authors’ answers to different cybersecurity interview questions, this easy-to-follow and actionable book will help you get ready and be confident. You’ll learn how to prepare and form a winning strategy for job interviews. In addition to this, you’ll also understand the most common technical and behavioral interview questions, learning from real cybersecurity professionals and executives with years of industry experience.By the end of this book, you’ll be able to apply the knowledge you've gained to confidently pass your next job interview and achieve success on your cybersecurity career path.

Microsoft Office 365: Exchange Online Implementation and Migration. With this guide, you can transfer Microsoft Exchange from your internal system to the cloud, smoothly and knowledgeably. The step-by-step, comprehensive approach makes implementation and migration a painless process

Loryan Strant, David Greve, David Greve

Microsoft Office 365 brings together cloud versions of the most trusted communications and collaboration products in a single desktop suite for businesses of all sizes. Microsoft Exchange Online gives you access to enterprise class email, calendar, and contacts from virtually anywhere, at any time, on desktops, laptops, tablets, and mobile devices.Microsoft Office 365: Exchange Online Implementation and Migration is a practical hands-on tutorial that shows small businesses to enterprises how to implement and migrate to Exchange Online in Office 365. This book also places an emphasis on setting up a Hybrid and migrating from Exchange on-premise to Exchange Online. Microsoft Office 365: Exchange Online Implementation and Migration will show small businesses to enterprises the steps to implement and migrate to Exchange Online in Office 365. The book starts by providing an overview of the Office 365 plans available and how to make a decision on what plan fits your organization. The book then dives into topics such as the Office 365 Admin Portal, integration options for professionals and small businesses, integration options for enterprises, preparing for a simple migration, performing a simple migration, and preparing for a hybrid deployment and migration amongst others.

Oracle Database 12c Backup and Recovery Survival Guide. A comprehensive guide for every DBA to learn recovery and backup solutions

Francisco Munoz Alvarez, Aman Sharma

The three main responsibilities of a successful DBA are to ensure the availability, recoverability, and performance of any database. To ensure the recoverability of any database, a DBA needs to have a strong backup and recovery skills set. Every DBA is always looking for a reference book that will help them to solve any possible backup and recovery situation that they can come across in their professional life.Oracle Database 12c Backup and Recovery Survival Guide has the unique advantage to be a reference to all Oracle backup and recovery options available, making it essential for any DBA in the world. If you are new to Oracle Database, this book will introduce you to the fantastic world of backup and recovery that is vital to your success. If you are an experienced DBA, this book will become a reference guide and will also help you to learn some possible new skills, or give you some new ideas you were never aware about. It will also help you to easily find the solution to some of the most well known problems you could find during your career as a DBA. This book contains useful screenshots, scripts, and examples that you will find more than useful.Most of the books currently available in the market concentrate only on the RMAN utility to backup and recovery. This book will be an exception to the rule and will become a must-have reference, allowing you to design a real and complete backup and recovery strategy. It covers the most important topics on Oracle database such as backup strategies, Nologging operations, new features in 12c, user managed backups and recoveries, RMAN (including reporting, catalog management, troubleshooting, and performance tuning), advanced data pump, Oracle Enterprise Manager 12c and SQL Developer.Oracle Database 12c Backup and Recovery Survival Guide contains everything a DBA needs to know to keep data safe and recoverable, using real-life scenarios.

Learning Vue.js 2. Learn how to build amazing reactive web applications easily with Vue.js

Olga Filipova

Vue.js is one of the latest new frameworks to have piqued the interest of web developers due to its reactivity, reusable components, and ease of use.This book shows developers how to leverage its features to build high-performing, reactive web interfaces with Vue.js. From the initial structuring to full deployment, this book provides step-by-step guidance to developing an interactive web interface from scratch with Vue.js.You will start by building a simple application in Vue.js which will let you observe its features in action. Delving into more complex concepts, you will learn about reactive data binding, reusable components, plugins, filters, and state management with Vuex. This book will also teach you how to bring reactivity to an existing static application using Vue.js. By the time you finish this book you will have built, tested, and deployed a complete reactive application in Vue.js from scratch.

R: Mining spatial, text, web, and social media data. Create and customize data mining algorithms

Nathan H. Danneman, Richard Heimann, Pradeepta Mishra, Bater Makhabel

Data mining is the first step to understanding data and making sense of heaps of data. Properly mined data forms the basis of all data analysis and computing performed on it. This learning path will take you from the very basics of data mining to advanced data mining techniques, and will end up with a specialized branch of data mining—social media mining.You will learn how to manipulate data with R using code snippets and how to mine frequent patterns, association, and correlation while working with R programs. You will discover how to write code for various predication models, stream data, and time-series data. You will also be introduced to solutions written in R based on R Hadoop projects. Now that you are comfortable with data mining with R, you will move on to implementing your knowledge with the help of end-to-end data mining projects. You will learn how to apply different mining concepts to various statistical and data applications in a wide range of fields. At this stage, you will be able to complete complex data mining cases and handle any issues you might encounter during projects.After this, you will gain hands-on experience of generating insights from social media data. You will get detailed instructions on how to obtain, process, and analyze a variety of socially-generated data while providing a theoretical background to accurately interpret your findings. You will be shown R code and examples of data that can be used as a springboard as you get the chance to undertake your own analyses of business, social, or political data.This Learning Path combines some of the best that Packt has to offer in one complete, curated package. It includes content from the following Packt products:? Learning Data Mining with R by Bater Makhabel ? R Data Mining Blueprints by Pradeepta Mishra? Social Media Mining with R by Nathan Danneman and Richard Heimann

The Ultimate Guide to Building a Google Cloud Foundation. A one-on-one tutorial with one of Google’s top trainers

Patrick Haggerty

From data ingestion and storage, through data processing and data analytics, to application hosting and even machine learning, whatever your IT infrastructural need, there's a good chance that Google Cloud has a service that can help. But instant, self-serve access to a virtually limitless pool of IT resources has its drawbacks. More and more organizations are running into cost overruns, security problems, and simple why is this not working? headaches.This book has been written by one of Google’s top trainers as a tutorial on how to create your infrastructural foundation in Google Cloud the right way. By following Google’s ten-step checklist and Google’s security blueprint, you will learn how to set up your initial identity provider and create an organization. Further on, you will configure your users and groups, enable administrative access, and set up billing. Next, you will create a resource hierarchy, configure and control access, and enable a cloud network. Later chapters will guide you through configuring monitoring and logging, adding additional security measures, and enabling a support plan with Google.By the end of this book, you will have an understanding of what it takes to leverage Terraform for properly building a Google Cloud foundational layer that engenders security, flexibility, and extensibility from the ground up.

The Lean-Agile Way. Unleash business results in the digital era with value stream management

Cecil 'Gary' Rupp, Richard Knaster, Steve Pereira, Al Shalloway, ...

In today’s fast-paced business landscape, efficiency is essential. Authored by industry experts Cecil ‘Gary’ Rupp, a Lean-Agile consultant with over three decades of executive experience; Richard Knaster, a SAFe® Fellow and transformation leader; Steve Pereira, a value stream consultant and board advisor; and Al Shalloway, creator of FLEX and PMI’s Disciplined Agile Value Stream Consultant workshop, the book offers proven strategies to streamline processes, enhance products, and improve service delivery. You’ll start with an introduction to foundational Lean and Agile practices, recognizing the significance of digital enhancements in modernizing business processes. As you progress, you'll learn VSM techniques to identify and prioritize work and investments to provide maximum value to customers. Moreover, you'll grasp Lean-Agile practices aimed at promoting collaboration among teams and ensuring the continuous flow of product-oriented deliveries tailored to address customer needs. Finally, you'll gain executive-level insights on how organizations must access timely information for decision-making and foster a culture of continuous business transformation. Armed with this knowledge and a robust toolkit, you'll be empowered to drive meaningful change, optimize resources, and stay ahead in the rapidly evolving marketplace.

Kivy: Interactive Applications in Python. For Python developers this is the clearest guide to the interactive world of Kivi, ideal for meeting modern expectations of tablets and smartphones. From building a UI to controlling complex multi-touch events, it's all here

Roberto Ulloa

Mobiles and tablets have brought with them a dramatic change in the utility of applications. Compatibility has become essential, and this has increased the kind of interaction that users expect: gestures, multi-touches, animations, and magic pens. Kivy is an open source Python solution that covers these market needs with an easy-to-learn and rapid development approach. Kivy is growing fast and gaining attention as an alternative to the established developing platforms.Kivy: Interactive Applications in Python quickly introduces you to the Kivy development methodology. You will learn some examples of how to use many of the Kivy components, as well as understand how to integrate and combine them into big projects. This book serves as a reference guide and is organized in such a way that once finished, you will have already completed your first project.You will start by learning the Kivy Language for building User Interfaces (UI) and vector figures. We then proceed to the uses of Kivy events and properties to glue the UI with the application logic.You then go on to build an entire User Interface (UI) starting from a hand-made sketch. Furthermore, you will go on to understand how to use the canvas and drawing instructions to create different types of geometrical figures. Finally, you will be introduced to a big set of interactive and smooth features: transformations (scale, rotate, and translate), gestures, animations, scheduling tasks, and multi-touch elements.Kivy: Interactive Applications in Python expands your knowledge by introducing various components that improve the User Experience (UX). Towards the end of the book, you will be confident to utilize Kivy components and strategies to start any application or game you have in mind.

Python 3 Object-oriented Programming. Building robust and maintainable software with object oriented design patterns in Python

Dusty Phillips

Python 3 is more versatile and easier to use than ever. It runs on all major platforms in a huge array of use cases. Coding in Python minimizes development time and increases productivity in comparison to other languages. Clean, maintainable code is easy to both read and write using Python's clear, concise syntax.Object-oriented programming is a popular design paradigm in which data and behaviors are encapsulated in such a way that they can be manipulated together. Many modern programming languages utilize the powerful concepts behind object-oriented programming and Python is no exception.Starting with a detailed analysis of object-oriented analysis and design, you will use the Python programming language to clearly grasp key concepts from the object-oriented paradigm. This book fully explains classes, data encapsulation, inheritance, polymorphism, abstraction, and exceptions with an emphasis on when you can use each principle to develop well-designed software.You'll get an in-depth analysis of many common object-oriented design patterns that are more suitable to Python's unique style. This book will not just teach Python syntax, but will also build your confidence in how to program.You will also learn how to create maintainable applications by studying higher level design patterns. Following this, you'll learn the complexities of string and file manipulation, and how Python distinguishes between binary and textual data. Not one, but two very powerful automated testing systems will be introduced in the book. After you discover the joy of unit testing and just how easy it can be, you'll study higher level libraries such as database connectors and GUI toolkits and learn how they uniquely apply object-oriented principles. You'll learn how these principles will allow you to make greater use of key members of the Python eco-system such as Django and Kivy.This new edition includes all the topics that made Python 3 Object-oriented Programming an instant Packt classic. It's also packed with updated content to reflect recent changes in the core Python library and covers modern third-party packages that were not available on the Python 3 platform when the book was first published. 

Edge Computing Patterns for Solution Architects. Learn methods and principles of resilient distributed application architectures from hybrid cloud to far edge

Ashok Iyengar, Joseph Pearson

Enriched with insights from a hyperscaler’s perspective, Edge Computing Patterns for Solution Architects will prepare you for seamless collaboration with communication service providers (CSPs) and device manufacturers and help you in making the pivotal choice between cloud-out and edge-in approaches.This book presents industry-specific use cases that shape tailored edge solutions, addressing non-functional requirements to unlock the potential of standard edge components. As you progress, you’ll navigate the archetypes of edge solution architecture from the basics to network edge and end-to-end configurations. You’ll also discover the weight of data and the power of automation for scale and immerse yourself in the edge mantra of low latency and high bandwidth, absorbing invaluable do's and don'ts from real-world experiences. Recommended practices, honed through practical insights, have also been added to guide you in mastering the dynamic realm of edge computing.By the end of this book, you'll have built a comprehensive understanding of edge concepts and terminology and be ready to traverse the evolving edge computing landscape.

ASP.NET MVC 4 Mobile App Development. If your skill-sets include developing in C# on the .NET platform, this tutorial is a golden opportunity to extend your capabilities into mobile app development using the ASP.NET MVC framework. A totally practical primer

Andrew Scott Meadows, Andy Meadows

The ASP.NET MVC 4 framework is used to build scalable web applications with the help of design patterns and .NET Framework. The Model-View-Controller (MVC) is a design principle which separates the components of a web application. This separation helps you to modify, develop, and test different components of a web application.ASP.NET MVC 4 Mobile App Development helps you to develop next generation applications, while guiding you to deal with the constraints the mobile web places on application development. By the end of the book, you will be well versed with all the aspects of mobile app development.ASP.NET MVC 4 Mobile App Development introduces you to developing mobile web apps using the ASP.NET MVC 4 framework. Walking you through the process of creating a homebrew recipe sharing application, this book teaches you the fundamentals and concepts relevant to developing Internet-ready mobile-enabled web apps. Through the sample application, you will learn how to secure your apps against XSS and CSRF attacks, open up your application to users using third party logins such as Google or Facebook, and how to use Razor, HTML 5, and CSS 3 to create custom views and content targeting mobile devices. Using these custom views, you will then learn how to create web apps with a native mobile device feel using jQuery mobile. By the end of the book, you will be presented with a set of challenges to prove to yourself that you now have the skills to extend your existing web applications to the mobile web or create new mobile web apps.

Raspberry Pi Sensors. Integrate sensors into your Raspberry Pi projects and let your powerful microcomputer interact with the physical world

Rushi Gajjar, Gajjar R Pareshkumar

Mastering Adobe Commerce Frontend. Build optimized, user-centric e-commerce sites with tailored theme design and enhanced interactivity

Jakub Winkler

Navigating the frontend realm of the Adobe Commerce platform can often feel like a labyrinth, given its multifaceted systems and intricate layering. This book demystifies Adobe Commerce frontend development, guiding you through its paths with clarity and precision.You'll learn how to set up your local environment, paving the way for a smooth development experience and navigate the platform's theming ecosystem, exploring layout XML systems and the power of templates. As you progress through the book, you'll leverage an array of JavaScript libraries and frameworks that Adobe Commerce boasts of, with special emphasis on RequireJS, jQuery, Knockout.JS, and UI Components. Additionally, you'll gain an understanding of the intricacies of Adobe Commerce CMS, explore frontend-related configurations in the admin panel, and unlock the secrets of frontend optimization.Practical exercises provided in the book will enable you to create top-notch Adobe Commerce sites that are functional, optimized, user-centric, and a step ahead in the ever-evolving frontend landscape.

Game Development Patterns with Unreal Engine 5. Build maintainable and scalable systems with C++ and Blueprint

Stuart Butler, Tom Oliver, Christopher J. Headleand

Design patterns serve as a toolkit of techniques and practices that enable you to write code that’s not only faster, but also more manageable. With this book, you’ll explore a range of design patterns and learn how to apply them to projects developed in Unreal Engine 5.You’ll begin by delving into the foundational principles of coding and develop a solid understanding of the concepts, challenges, and benefits of using patterns in your code. As you progress, you’ll identify patterns that are woven into the core of Unreal Engine 5 such as Double Buffer, Flyweight, and Spatial Partitioning, followed by some of the existing tool sets that embody patterns in their design and usage including Component, Behavior Tree, and Update.In the next section of the book, you’ll start developing a series of gameplay use cases in C++ to implement a variety of design patterns such as Interface and Event-based Observers to build a decoupled communications hierarchy. You’ll also work with Singleton, Command, and State, along with Behavioral Patterns, Template, Subclass Sandbox, and Type Object. The final section focuses on using design patterns for optimization, covering Dirty Flag, Data Locality, and Object Pooling.By the end, you’ll be proficient in designing systems with the perfect C++/Blueprint blend for maintainable and scalable systems.