Computer History and Fundamentals

The Intel P6 microarchitecture (Pentium Pro and later) introduced RISC-like features, such as translating complex x86 instructions into simpler micro-operations. The 80486 and 80586 (Pentium) are primarily CISC architectures.

The Intel 4004 was the first commercially available microprocessor and was designed as a 4-bit central processing unit.

Fourth generation computers are characterized by Very Large Scale Integration (VLSI) technology, which allows thousands of transistors to be placed on a single chip.

VisiCalc was the first spreadsheet program for personal computers. It was designed to be accessible to non-programmers, effectively turning the personal computer into a useful business tool.

Jack Kilby of Texas Instruments is credited with inventing the first integrated circuit in 1958. Robert Noyce independently developed a more practical version using silicon shortly after.

The Intel 4004, released in 1971, is widely recognized as the first commercially available microprocessor.

John Von Neumann is credited with the stored-program concept, where both instructions and data are stored in the same memory space.

The MITS Altair 8800, released in 1975, was famously sold as a kit that users had to assemble themselves, sparking the personal computer revolution.

The IBM System/360, introduced in 1964, was a family of mainframe computers that used integrated circuits, marking a major shift in computer design.

Niklaus Wirth created the Pascal programming language in 1970. It was designed as a language for teaching structured programming.

The IBM 7090 is widely considered one of the first fully transistorized, second-generation computers, replacing the vacuum tubes of the first generation.

Marcian Ted Hoff, along with Federico Faggin, Stanley Mazor, and Masatoshi Shima, designed the Intel 4004, and Hoff led the conceptual team.

High level programming languages were first developed during the third generation.

Gottfried Wilhelm Leibniz invented the Stepped Reckoner in the 17th century, a mechanical calculator capable of performing all four arithmetic operations and square roots.

The second generation of computers (roughly 1955-1965) replaced vacuum tubes with transistors, which were smaller, faster, and more reliable.

The MANIAC (Mathematical Analyzer, Numerical Integrator, and Computer) was built at Los Alamos and was used for calculations related to the hydrogen bomb project.

Charles Babbage's Difference Engine was a mechanical calculator designed to be powered by steam, intended to automate the calculation of mathematical tables.

The IBM PC-AT (Advanced Technology) was introduced in 1984, featuring the Intel 80286 processor and a 16-bit bus.

The EDVAC (Electronic Discrete Variable Automatic Computer) was one of the earliest computers to implement the stored-program concept, following the theoretical design of Von Neumann.

Babbage's Analytical Engine was never completed during his lifetime, but its design included the essential components of a modern computer, such as an ALU, memory, and control flow.

The PowerPC architecture, developed by the AIM alliance (Apple, IBM, Motorola), is a classic example of RISC (Reduced Instruction Set Computer) technology.

The Epson HX-20, released in 1981, is generally recognized as the first handheld/laptop computer.

IBM was formed in 1911 as the Computing-Tabulating-Recording Company (CTR) and was renamed International Business Machines (IBM) in 1924.