:shift left (or right) logical: [from any of various machines'
instruction sets] 1. vi. To move oneself to the left (right). To
move out of the way. 2. imper. "Get out of that (my) seat! You
can shift to that empty one to the left (right)." Often
used without the `logical', or as `left shift' instead of
`shift left'. Sometimes heard as LSH /lish/, from the {PDP-10}
instruction set. See {Programmer's Cheer}.
-- The AI Hackers Dictionary
