Computer Fundamentals

Electronic circuits called integrated chips which had transistors closely packed on thin wafers used in third generation computers.

Howard Aiken, in collaboration with IBM, developed the Harvard Mark I, which was an electromechanical computer completed in 1944.

Second-generation computers (roughly 1956-1963) replaced vacuum tubes with transistors, which are semiconductor devices used to amplify or switch electronic signals.

ENIAC was designed and built by John Mauchly and J. Presper Eckert at the University of Pennsylvania.

Blaise Pascal invented the Pascaline, a mechanical adding machine, in 1642 to assist his father with tax calculations.

The EDSAC (Electronic Delay Storage Automatic Calculator) was built at the University of Cambridge in the UK and performed its first calculation in 1949.

Charles Babbage is widely considered the father of the computer for his designs of the Difference Engine and the Analytical Engine.

Ada Lovelace is recognized as the first computer programmer for her work on Babbage's Analytical Engine, specifically for writing an algorithm intended for the machine.

PDA stands for Personal Digital Assistant, a term used for handheld devices that functioned as personal information managers.

The abacus is an ancient calculating tool that originated in China and has been used for centuries for arithmetic operations.

John Napier is credited with the invention of logarithms in the early 17th century, which greatly simplified complex calculations.

Historical estimates for the origin of the abacus vary, but 1450 B.C. is a commonly cited date in many historical computing textbooks.

Registers are the fastest type of memory in a computer system, located directly inside the CPU to provide immediate access to data for processing. Hard disks are secondary storage, and main memory (RAM) is slower and external to the processor core.

Standard Hollerith punch cards, which were widely used in early computing, were designed with 12 rows and 80 columns.

EBCDIC stands for Extended Binary Coded Decimal Interchange Code. It is an 8-bit character encoding used primarily on IBM mainframe and midrange computer operating systems.

HLL is the standard abbreviation for High Level Language, which refers to programming languages like C, Java, or Python that are closer to human language than machine code.

Computer storage media is generally categorized into three types: primary storage (RAM/ROM), secondary storage (HDD/SSD/Optical), and tertiary storage (tape libraries).

The electronic flip-flop circuit was invented by William Eccles and F.W. Jordan in 1918, which later became the fundamental building block for digital memory.

George Boole developed Boolean algebra, which is the mathematical foundation for digital logic and computer circuit design.

ENIAC (Electronic Numerical Integrator and Computer) is widely recognized as the first programmable, electronic, general-purpose digital computer of the first generation.

A light pen is an input device that uses a light-sensitive detector to allow a user to point to displayed objects or draw on the screen in a similar way to a touchscreen.

UNIVAC I (Universal Automatic Computer I) was the first commercial computer produced in the United States, delivered to the U.S. Census Bureau in 1951.

The first generation of computers, characterized by the use of vacuum tubes, is generally defined as spanning from approximately 1945 to 1955.

A Front End Processor (FEP) is a small computer that interfaces between a host computer and other devices, such as terminals or communication lines, to handle tasks like data formatting.