Ada

Ada is a structured object oriented and procedural language in the Algol family that was introduced in the early 80's by Honeywell Bull (Now Groupe Bull) and was largely modelled on Niklaus Wirth's Pascal.

A list of OS/2 implementations of Ada

• GNAT - Open Source - Discontinued
• Intermetrics Ada - Announced, possibly never released.
• OC Systems Ada - Announced for OS/2 PowerPC edition but probably never released.
• Thomson Software Products Ada - Discontinued

Libraries and bindings

• PM Bindings for GNAT

A list of DOS implementations of Ada

• ADA/ED - Open Source - Discontinued - Interpreted predecessor to GNAT.
• Aonix Ada - Commercial - Discontinued
• Artek Ada - Commercial - Discontinued.
• AVLAda9x - Takes over from SMALLAda, adds some Ada95 constructs. - Discontinued - Freeware
• GW-Ada/Ed for DOS
• Janus/Ada 83 - Current
• Janus/Ada 95 - Current
• Meridian Open Ada
• SMALLAda - Discontinued - Ada Subset - Freeware.

Standards

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