AIA                at01  Aerospace Industries Association
ASD                at01  AeroSpace Defence Industries Association of Europe
ATA                at01  Air Transport Association
HTML               at01  Hyper Text Markup Language
XML                at01  Extensible Markup Language
XSL                at01  Extensible Stylesheet Language
markup language    at02  A system for annotating a document in a way that is syntactically distinguishable from the text
military aircraft  at02  Any fixed-wing or rotary-wing aircraft that is operated by a legal or insurrectionary armed service of any type