Acorn computer econet level 2/3 User Manual page 57

<num-var>=BGET#<ch>
puts into the variable the contents of the byte pointed to
BPUT#<ch>,<numeric>
puts the number or variable into the byte pointed to
INPUT#<ch>,<num-vars or string-vars>
puts data from the file into the numeric or string variables
specified
PRINT#<ch>,<numerics or strings>
puts the numbers, strings or variables into the file
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