subprogram
noun
sub·pro·gram ˈsəb-ˌprō-ˌgram 
-grəm
: a semi-independent portion of a program (as for a computer)
Example Sentences
Recent Examples on the Web There also will be a new subprogram this year, which will provide assistance and guidance to newer nonprofit leaders. 
Chanel Stitt, Detroit Free Press, 1 May 2021 The JMR program has several subprograms, with the Future Vertical Lift-Medium set to replace the UH-60 and AH-64 and the FVL-Heavy set to replace the CH-47. Kyle Mizokami, Popular Mechanics, 12 Apr. 2017
Chanel Stitt, Detroit Free Press, 1 May 2021 The JMR program has several subprograms, with the Future Vertical Lift-Medium set to replace the UH-60 and AH-64 and the FVL-Heavy set to replace the CH-47. Kyle Mizokami, Popular Mechanics, 12 Apr. 2017 Word History
First Known Use
1947, in the meaning defined above