cr: ( -- ) emits a carriage return

.: ( x -- ) pops and prints the literal value on the top of the data_stack

.s: ( -- ) prints the whole data_stack, without touching it

emit: ( c -- ) pops and prints (without cr) the binary of an ascii value on the top of the data_stack

"?": ( var -- ) fetch a variable value and prints it

inspect: ( x -- ) pops and prints the inspected value on the top of the data_stack

puts: ( x -- ) pops and prints the literal value on the top of the data_stack

set-io-device: ( name -- ) set the current IO device to the value on the top of the data_stack