Opus

[oh-puh s] /ˈoʊ pəs/

noun, plural opuses or especially for 1, 2, opera
[oh-per-uh, op-er-uh] /ˈoʊ pər ə, ˈɒp ər ə/ (Show IPA)
1.
a musical composition.
2.
one of the compositions of a composer, usually numbered according to the order of publication.
3.
a literary work or composition, as a book:
Have you read her latest opus?
Abbreviation: op.
[fee-nis-koh-roh-naht-oh-poo s; English fin-is kaw-roh-nat oh-puh s, koh-] /ˈfi nɪs koʊˈroʊ nɑtˈoʊ pʊs; English ˈfɪn ɪs kɔˈroʊ næt ˈoʊ pəs, koʊ-/
Latin.
1.
the end crowns the work.
/ˈəʊpəs; ˈɔp-/
noun (pl) opuses, opera (ˈɒpərə)
1.
an artistic composition, esp a musical work
2.
(often capital) (usually followed by a number) a musical composition by a particular composer, generally catalogued in order of publication: Beethoven’s opus 61 is his violin concerto
n.

“a work, composition,” especially a musical one, 1809, from Latin opus “a work, labor, exertion” (source of Italian opera, French oeuvre, Spanish obra), from PIE root *op- (Germanic *ob-) “to work, produce in abundance,” originally of agriculture later extended to religious acts (cf. Sanskrit apas- “work, religious act;” Avestan hvapah- “good deed;” Old High German uoben “to start work, to practice, to honor;” German üben “to exercise, practice;” Dutch oefenen, Old Norse æfa, Danish øve “to exercise, practice;” Old English æfnan “to perform, work, do,” afol “power”). The plural, seldom used as such, is opera.
project, product
A Honeywell operating system promised as a sop to customers after canning Multics in 1985. Opus was to provide everything Multics had and more, plus total compatibility with the Level 6/DPS6 operating system.
“Opus” was a code name, the system was officially named VS3 (short for HVS R3 or Honeywell Virtual System Release Three). It was to run on the DPS6-plus hardware known internally as the MRX and HRX, and be all things to all people.
The hardware was a dud (though it did run the native DPS6 software just fine), and the goal was, shall we say, ambitious. The effort was cancelled by Bull in 1987, in favor of another project going on in France.