Like input-output symbols, process boxes have a single line connecting it to the previous flowchart step and a single line leading to the next one. A flowchart may contain any number of process boxes.

A flowchart is a pictorial or graphical representation of a process. Flowcharts are used in many industries including entertainment, engineering, physical sciences and computer programming. The ...

Nathan Ensmenger, “The Multiple Meanings of a Flowchart,” Information & Culture 51, no. 3 (August 2016), pp. 321–51. Thomas Haigh, Mark Priestley, and Crispin Rope, ENIAC in Action: Making and ...