1, The full form of Inst is Institute. It’s used on Academic & Science ,Language & Linguistics in Worldwide

Institute (Inst.) is an organization founded for a particular purpose, especially one that is involved with science, education, or a specific profession.

2, The full form of Inst is Instrument/Instrumental. It’s used on Arts ,Musical Instruments in Worldwide

Inst means Instrument or Instrumental, with reference to music.

3, The full form of Inst is Install/Installation. It’s used on Computing ,General Computing in Worldwide

Inst means Install or Installation in Computing.

4, The full form of Inst is Instant/instante mense,[this month]. It’s used on Academic & Science ,Language & Linguistics in Worldwide

Inst. is short for instant (current) or instante mense. Instante mense is a Latin term meaning “this month’. The term Inst. was commonly used in nineteenth-century letters and memos to refer to the current month. Its counterparts were:

ult. :ultimo mense (last Month)

prox. :proximo mense (next month)

Examples:

the 10th inst. = the 10th of the current month.

the 10th ult. = the 10th of the last month.

the 10th prox. = the 10th of the next month.