D.C. Mun. Regs. tit. 27, r. 27-1399
When used in this chapter, the following terms and phases shall have the meanings ascribed:
Commercially-available "off-the-shelf" items - Items produced and placed in stock by a contractor, or stocked by a distributor, before receiving orders or contracts for their sale, including items for commercial order or produced to government specification or description.
Standard commercial services - Installation, maintenance, repair, training or other services necessary for proper use of commercially-available "off-the-shelf" items; services offered to both the general public and the government under similar terms and conditions; or services of a type offered and sold competitively in substantial quantities in the commercial marketplace for specific tasks performed under standard commercial terms and conditions.
D.C. Mun. Regs. tit. 27, r. 27-1399