62 Pa. C.S. § 1501
The following words and phrases when used in this chapter shall have the meanings given to them in this section unless the context clearly indicates otherwise:
"Excess supplies." All nonexpendable supplies having a remaining useful life but which are no longer required by the using agency in possession of the supplies.
"Expendable supplies." All tangible supplies other than nonexpendable supplies.
"Nonexpendable supplies." All tangible supplies having an original acquisition cost of over $100 per unit and a probable useful life of more than one year.
"Supplies." Supplies owned by Commonwealth agencies.
"Surplus supplies." Nonexpendable supplies no longer having any use to any Commonwealth agency. The term includes obsolete supplies, scrap materials and nonexpendable supplies that have completed their useful life cycle. The term does not include road or bridge materials or equipment that have been declared surplus by the Department of Transportation under section 510 of the act of April 9, 1929 (P.L. 177, No. 175), known as The Administrative Code of 1929.
62 Pa.C.S. § 1501