Software bug
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A software bug is bug in computer software.
Error resulting from a software bug displayed on two screens at La Croix de Berny station in France
Programming language
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A programming language is a system of notation for writing computer programs.
Two people using an IBM 704 mainframe—the first hardware to support floating-point arithmetic—in 1957. Fortran was designed for this machine.
A small selection of programming language textbooks