[Ernest_at_the_Beach]

I can't answer those questions, but I never did anything with DEC.

I did use the Test Under Mask on the 360 Assembler language.

[Ernest_at_the_Beach]

Another language that goes back a ways is APL:

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History

APL stands for "A Programming Language." It was created in the 1960's by Ken Iverson and his colleagues at IBM. Mathematically inspired, its main purpose was to serve as a powerful executable notation for mathematical algorithms. What APL is best known for is its use of non-ASCII symbols, including some Greek letters. It is a dynamically typed interactive, array oriented language with a dynamic scope. In APL, all expressions are evaluated from right to left.

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Significant Language Features

• Non-Standard Character Set - APL makes use of a character set which contains some non-ASCII characters, including some Greek letters.
• Dynamic Array Universe - APL's environment consists of arrays, created dynamically.
• Interaction - APL is an interactive language.

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<! Where is this language used? simulation, application programming, education, embedded systems, etc. >

Areas of Application

• Mathematical Algorithms
• Statistics

APL - Array Programming Language

You could do some neat stuff with the language.