Pop

Calculus

Pop is the f⁽⁶⁾(t) or the sixth derivative of time. For more, see Acceleration's article.

(18.01.1x discussions by EmilyMcKee and jfrench, justuslearning.com/wp-content/uploads/2013/12/AIAAOC_SnapCracklePop_docx.pdf)

Linux

Most email clients use the Internet Message Access Protocol (IMAP) or the older Post Office Protocol (POP) to access emails stored on a remote mail server.

(LFS101x)