[BulletBobCo]

The mainframe of the NAS (National Airspace System) is written in Jovial, Bal and Assembler languages.

[BulletBobCo]

Jovial stands for Jules' Own Version of the International Algorithmic Language (IAL). IAL was an early name for Algol, and Jules Schwartz was the initial designer.
Jovial was primarility used by the US Air Force, its contractors, and some other NATO military organizations. By the mid-1980s, Jovial had been largely superseded by newer languages such as Pascal, Modula-2, CLU, and especially Ada. It still exists, though, mostly for code maintenance and porting of legacy systems.

[D-fendr]

Thanks Bob.

Had me scared there for a bit...