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20 The PRINT KEY
prints the contents of an
addressed register.
21 The CLEAR KEY
clears the contents of an
addressed register. When the computer is operated
manually, a depression of this key will print the number
in that register and clear it.
22 The TRANSFER KEYS
perform transfer operations
between the storage registers and the operating
registers. (Refer to discussion of transfer operations for
the function of each transfer key.)
23 The ARITHMETIC KEYS
perform their indicated
arithmetic function.
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