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What was before A.P.I even existed?

Before APIs existed, software systems were monolithic, isolated islands that could not easily communicate with each other. If two different programs needed to share data, developers had to rely on physical media transfers, manual data reentry, or hardcoded tightly-coupled integrations. Because the abstract concept of a local "Application Programming Interface" dates back to the 1940s and 50s, "life before APIs" is generally divided into two eras: the era before local computer libraries (1940s–1950s) and the era before modern web/network APIs (1960s–1990s). The Pre-API Era: Connecting Isolated Mainframes (1940s–1950s)  In the earliest days of computing, software was written as one massive block of code. To pass information between systems or reuse functionalities, programmers used the following physical and manual methods: Punch Cards and Magnetic Tapes: Data from one computer was printed onto physical punch cards or saved to tape reels. A human operator would walk t...
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What is the purpose of computer science and engineering.why should a person do it and what are the various achievements he or she or other can achieve?

Computer Science and Engineering (CSE) drives global innovation by blending the theoretical foundations of computation with electronic engineering. People pursue it to build high-demand, high-paying careers, solve complex real-world problems, and shape the future. Graduates create life-changing technologies like artificial intelligence, life-saving medical software, and global communication networks.  Purpose of Computer Science and Engineering  • Problem Solving: Develops scalable algorithms and systems to solve complex, real-world challenges in healthcare, finance, and logistics.  • Automation: Creates software and hardware to automate repetitive tasks, boosting efficiency and productivity across industries.  • Connectivity: Builds the infrastructure for the internet, mobile networks, and IoT to connect billions of people worldwide.  Why a Person Should Study CSE  • High Demand & Job Security: The Bureau of Labor Statistics projects strong employmen...
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Are there any books that teach us to make a professional website from very scratch?

Yes, there are several highly acclaimed books that teach you how to build a professional website entirely from scratch , assuming zero prior coding knowledge. These books guide you through the raw fundamentals of structuring, designing, and launching a functional site. [1, 2, 3] The best book options are organized below by their specific teaching style: Highly Visual & Beginner-Friendly HTML and CSS: Design and Build Websites by Jon Duckett: This is widely considered the most beautiful and accessible book on web coding. It eschews dry blocks of code in favor of full-color infographics and photography, making it perfect for visual learners who want to master layout structure and styling. [4, 5] Learning Web Design: A Beginner's Guide by Jennifer Niederst Robbins: Written by one of the web's earliest designers, this comprehensive guide provides a no-nonsense foundation in HTML5, CSS3, JavaScript, and even web graphics, featuring helpful exercises at the end of each section...
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what is (1/2)!

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The Beautiful Gamma Function and the Genius Who Discovered It What is the factorial of 1/2?                  Kasper Muller redrik What is your favorite function? If your answer is not the gamma function, then I’ll ask you again after you have read this article. Your answer might have changed… Introduction In the late 1720s,  Leonhard Euler  was thinking about how to extend the  factorial  to non-integer values. This was the start of a rich theory used all over the scientific world. A theory of one of the most important functions in mathematics. Leonhard Euler is, without doubt, one of the greatest mathematicians in history. To give you an idea of Euler’s powers here follows some examples that show his brilliance. First of all, Euler had an outstanding memory! He was able to recite Virgil’s Aeneid from beginning to end, detailing in what line every page of the edition he owned began and ended. To give you some context,...
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