OCTET ferred frequencies as specified in ASA-53. The width of an octave band in hertz is approximately 71% of its mid-band frequency. OCTET A subdivision of bits numbered from 8 to 1, where bit 8 is the most significant bit and bit 1 is the least significant bit. OFF-LINE Descriptive of a system and of the peripheral equipment or devices in a system in which the operation of peripheral equip- ment is not under the control of the central processing unit. OFF-LINE TESTING The testing of an item with the item removed from its normal operational environment. OFF-THE-SHELF ITEM An item that has been developed and produced to military or commercial standards and specifications, is readily available for delivery from an industrial source, and may be acquired without change to satisfy a military requirement. ONE HUNDRED PERCENT INSPECTION Inspection in which specified characteristics of each unit of product are examined or tested to determine conformance with requirements. ONE-LINE DIAGRAM See Single-line diagram. ONE-TIME PROGRAMMABLE MEMORY DEVICE A mem-