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History
Computer programming
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Computer programming or coding is the composition of sequences of instructions, called programs, that computers can follow to perform tasks. It involves designing and implementing algorithms, step-by-step specifications of procedures, by writing code in one or more programming languages. Programmers typically use high-level programming languages that are more easily intelligible to humans than machine code, which is directly executed by the central processing unit. Proficient programming usually requires expertise in several different subjects, including knowledge of the application domain, details of programming languages and generic code libraries, specialized algorithms, and formal logic.
Ada Lovelace, whose notes were added to the end of Luigi Menabrea's paper included the first algorithm designed for processing by Charles Babbage's An
Ada Lovelace, whose notes were added to the end of Luigi Menabrea's paper included the first algorithm designed for processing by Charles Babbage's Analytical Engine. She is often recognized as history's first computer programmer.
Data and instructions were once stored on external punched cards, which were kept in order and arranged in program decks.
Data and instructions were once stored on external punched cards, which were kept in order and arranged in program decks.
Wired control panel for an IBM 402 Accounting Machine. Wires connect pulse streams from the card reader to counters and other internal logic and ultim
Wired control panel for an IBM 402 Accounting Machine. Wires connect pulse streams from the card reader to counters and other internal logic and ultimately to the printer.
The first known actual bug causing a problem in a computer was a moth, trapped inside a Harvard mainframe, recorded in a log book entry dated Septembe
The first known actual bug causing a problem in a computer was a moth, trapped inside a Harvard mainframe, recorded in a log book entry dated September 9, 1947. "Bug" was already a common term for a software defect when this insect was found.
Computer program
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A computer program is a sequence or set of instructions in a programming language for a computer to execute. It is one component of software, which also includes documentation and other intangible components.
Lovelace's description from Note G
Lovelace's description from Note G
Glenn A. Beck changing a tube in ENIAC
Glenn A. Beck changing a tube in ENIAC
Switches for manual input on a Data General Nova 3, manufactured in the mid-1970s
Switches for manual input on a Data General Nova 3, manufactured in the mid-1970s
A VLSI integrated-circuit die
A VLSI integrated-circuit die