Seems to have been part of the user interface

https://en.wikipedia.org/wiki/Apollo_Guidance_Computer#Softw...

  A set of interrupt-driven user interface routines called Pinball provided keyboard and 
  display services for the jobs and tasks running on the AGC. A rich set of user-accessible 
  routines were provided to let the operator (astronaut) display the contents of various 
  memory locations in octal or decimal in groups of 1, 2, or 3 registers at a time. 
  Monitor routines were provided so the operator could initiate a task to 
  periodically redisplay the contents of certain memory locations. Jobs could be 
  initiated. The Pinball routines performed the (very rough) equivalent of the 
  UNIX shell.