&

& sigil alias for 'and' on truth values (yes & no is false, with a hint toward the word and); of two whole numbers it combines the bits: 12 & 10 is 8 (operator).

inverse function composition

Planned: (card amp-compose) natural for beginners but unfamiliar for long time programmers

square & print 2 == print(square(2))

& sigil for function pointers

map &square [1 2 3] == [1 4 9]

Note that due to automatic broadcasting explicitly using map and pointers should rarely be needed.