- Start or end of the program
Represented as circles, ovals or rounded rectangles, usually containing the word "Start" or "End", or another phrase signaling the start or end of a process, such as "submit inquiry" or "receive product".
- Computational
steps or processing function of a program
A solud rectangle
- Input or
output operation
Represented as a parallelogram. Examples: Get X from the user; display X.
- Decision
making and branching
A diamond
- Flow line
A flow line, used on a drilling rig, is a large diameter pipe that is connected
to the bell nipple and extends to the possum belly (on the mud tanks) and acts
as a return line.
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