The Silicon Jungle by David H. Rothman

2. From MODEM7’s main menu, type =S B:[name of the data disk file you

want to transmit—either a program or a letter= =or other document]=. The =B:= shows the file is on the =B= disk. If it isn’t, just type =S= and the name of the file—for instance, =S MAGIC=. If =MAGIC= is on =B=, type =S B:MAGIC=.