firs - FORT
- First Capital
- first class conductor
- first column
- First Column Contains
- First Connected Port
- First Data Series
- first element of chain
- first fit
- first item list
- First Key Sort Order
- first level addressing
- first line
- first line form advance
- first litter
- first moments
- first of chain
- first operand
- first order
- first order decay
- first order logic
- first order theory
- First Overlay Series
- first page indicator
- first partial product
- first pass
- first place
- first probability distribution
- First Row Contains
- first selecting
- first speaker
- first storage level
- first symbol
- first term
- first textword
- first word of text
- first-choice
- first-choice route
- first-come first-served schedule
- first-ended first-out
- first-fit method
