Fortran

3 clues
Computer language
Programming language
Early programming language
Similar answers:
Abefortas
Abelleforadano
Abicyclebuiltfortwo
Acarterandaford
Acaseforholding
Accountsfor
Acesforimpact
Achefor
Acheforum
Achesfor
Achesforthestars
Achfor
Achumpatoxford
Aciform
Actedfor
Actfor
Actiniform
Adayforking
Adefiantoldmaidprayforg
Adiamondisforheifer