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Nonprocedural language

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NPL (for NonProcedural Language) was a relational database language developed by T.D. Truitt et al[1][2] in 1980 for Apple II and MS-DOS.

Notes and references

  1. ^ "An Introduction to Nonprocedural Languages Using NPL", T.D. Truitt et al, McGraw-Hill 1983.
  2. ^ Truitt, T. D. "NPL: the nonprogrammer's data base language" Computer Language 4(06) June 1987 pp97-103

Modern languages such as Visual Basic or Java are called non-procedural or event-driven, languages because instead of writing a series of sequential instructions, a programmer defines the actions that the program must perform when certain events occur.

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