plural LPs, LP's.
Examples from the Web for lps
This is a big part of why LPs were for adults, along with the fact that no pop idol could cobble together 12 songs of any quality.Before the Earthquake Hit: When The Beatles Landed in America|Michael Tomasky|January 29, 2014|DAILY BEAST
But according to the LPS data, underwater borrowers are also prepaying at a much faster clip.New Data Shows HARP Mortgage Refinance Program Is Finally Working|Matthew Zeitlin|October 4, 2012|DAILY BEAST
abbreviation for (in Britain)
- a long-playing gramophone record: usually one 12 inches (30 cm) or 10 inches (25 cm) in diameter, designed to rotate at 33 1/3 revolutions per minuteCompare EP
- (as modifier)an LP sleeve
1948, abbreviation of long-playing phonograph record.
The most revolutionary development to hit the recording industry since the invention of the automatic changer is the Long Playing record, which can hold an entire 45-minute symphony or musical-comedy score on a single 12-inch disk. ... The disks, released a few weeks ago by Columbia Records and made of Vinylite, have phenomenally narrow grooves (.003 of an inch). They are played at less than half the speed of the standard old-style records. ["Life" magazine, July 26, 1948]