Space Cadet keyboard

Apparent glyphs available on the 1978 (later Symbolics) Space Cadet keyboard by pressing either the Greek/Front or Top key. Distinct from the modern IBM standard for APL programming.

Esc
mode : numeric row meta +` ¬ +1+2+3+4 ¢ +5+6+7 ÷ +8 × +9+0+- ¯ +=
mode : top row meta +q θ +w ω +e ε +r ρ +t τ +y ψ +u υ +i ι +o ο +p π +[+]
mode : top row qwertyuiop[ ]
mode : home row meta +a α +s σ +d δ +f φ +g γ +h η +j ϑ +k κ +l λ +; ¨ +' · +\
mode : home row asdfghjkl; ' \
mode : bottom row meta +z ζ +x ξ +c χ +v ς +b β +n ν +m μ +,+.+/
mode : bottom row zxcvbnm, . /

similar
transliterates or transcribes an expected letter
greek
different Greek letters or symbols
symbol
other character not directly deducible from key
punctuation
(punctuation) mark
mark
modifier letter or mark (spacing diacritic)