Editing Computer programming (section)

===Machine language===
[[Machine code]] was the language of early programs, written in the [[instruction set architecture|instruction set]] of the particular machine, often in [[binary numeral system|binary]] notation. [[Assembly language]]s were soon developed that let the programmer specify instructions in a text format (e.g., ADD X, TOTAL), with abbreviations for each operation code and meaningful names for specifying addresses. However, because an assembly language is little more than a different notation for a machine language,  two machines with [[Comparison of instruction set architectures|different instruction sets]] also have different assembly languages.

[[File:IBM402plugboard.Shrigley.wireside.jpg|thumb|Wired [[plugboard|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.]]