Undefined Terms - Command Line/Shell section

[juliebates]

'resolve' - as in 'unresolved commands'. [commands that cannot be completed?]
HPC (acronym). - High Performance Computing?
PID - process ID?
'overlay distribution'. - this seems like an important concept operationally, definition would help me
'readline library' [I derived the following from https://en.wikipedia.org/wiki/GNU_Readline]
Readline library = software library that provides line-editing AND history capabilities for interactive programs with command line interface
Supports both Emacs and vi editing