Definitions for "off-the-shelf"
Procurement of existing systems or equipment without a research, development, test, and evaluation (RDT&E) program or with minor development to make system suitable for DoD needs. May be commercial system/equipment or one already in DoD inventory. (See Nondevelopmental Item (NDI)).
Made in large quantities and intended to be used without modifications; -- similar to off-the-rack, but not restricted to clothing. Opposite of custom-made, made-to-order, or one-of-a-kind.
(especially of clothing) made in standard sizes and available from merchandise in stock; "a ready-made jacket"; "ready-to-wear clothes"
hardware or software already produced and available from a commercial vendor.
The standard, noncustomized version of a manufactured product. See also Customization.
An expression to describe goods already manufactured and for sale in high street shops etc.
Pertaining to equipment already manufactured and available for delivery from stock.
Keywords:  counter, twist
twist counter
Refers to a general purpose system, readily available for immediate shipment, which is not configured for a specific application.