A post-it note.

simple past tense and past participle of post

plural of posting

The action of the verb to post. / An item inserted into a register, ledger or diary. / (computing) A message posted to a computerized bulletin board, a newsgroup, a blog, etc.

present participle of post

after, later / (anatomy) behind

(computing) To successfully perform a power-on self-test.

(networking) An HTTP request method used to send an arbitrary amount of data to a web server. / (computing) Acronym of power-on self-test.

A long dowel or plank protruding from the ground; a fencepost; a lightpost. / (construction) A stud; a two-by-four. / A pole in a battery.

(film, informal) Post-production.