JOSS
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JOSS was one of the first interactive, time-sharing programming languages. It pioneered many features that would become common in languages from the 1960s into the 1980s, including use of line numbers
Part of a JOSS session at RAND in 1970 in which the user carries several simple calculations in direct mode. Note the difference between the period at the end of the statements and the interpunct for multiplication.
JOSS used a custom type ball, similar to this example, for its IBM Selectric typewriter terminals to provide mathematical symbols.
FOCAL (programming language)
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FOCAL is an interactive interpreted programming language based on JOSS and mostly used on Digital Equipment Corporation PDP series machines.
JOSS
…CITRAN, ISIS, PIL/I, JEAN (ICT 1900 series), BOSS and INTERP on the Burroughs B5500, Algebraic Interpretive Dialogue (AID, on PDP-10). Others, such as FOCAL and MUMPS, developed in distinctive directions. JOSS also bears a strong resemblance to the BASIC interpreters found on microcomputers in the 1980s…
PDP-8 punched tapes, including a FOCAL-69 tape dated 7/9/69