( . imperativus ) . , , (), . , . . , .. , . .
(FORTRAN FORmula TRANslation ) , 50- . IBM . - . . , . 2000 . F2k, HPF (High Performance Fortran ). , PL-1 .
(COBOL COmmon Business Oriented Language ) , , . - . 19581960 . .
(ALGOL ALGOrithmic Language ) 1960 . 1968 . -68. . , - .
/1 (PL/1 Programming Language One ) IBM 19631966 . , . PL/1 , -60, . IBM , .
(BASIC Beginners All-purpose Symbolic Instruction Code ) 60- . , . , , , , .
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(Pascal) (16231662). 19681971 . () (), , . -60, , .
(Ada) , , , . 60- 80- . . . 1979 . . . , . , .
() Bell UNIX 70- . . , , . , , . .