IBM 704 - Manual (Page 240)

About the Test Programs
F10 Displays the Local Menu when the Module
Tests Menu is displayed or from individual
Test Group test screens. Local Menu includes
the following selections:
Test Options serves as a shortcut to
accessing and changing the test options
without having to back up through
menus.
Single Test moves from the Module Test
Menu
to the relevant Test Group window
for test selection.
Next and Previous LUN changes from one
Logical Unit Number (LUN) or device to
another (for example, HD1 to HD2, or
Base Memory to Extended Memory).
+
Displays next logical unit number (for
example, COM1, COM2, or First
Microprocessor, Second Microprocessor, and
so on).
−
Displays previous logical unit number.
222 PC Server 704 User's Handbook