In this subchapter:
(1) "Component purchases" means purchases of the component parts of an item that in normal purchasing practices would be purchased in one purchase.
(2) "Governmental entity" means:
(A) a county;
(B) a common or independent school district;
(C) a hospital district or authority;
(D) a housing authority; or
(E) an agency or instrumentality of the governmental entities described by Paragraphs (A) through (D).
(3) "Separate purchases" means purchases, made separately, of items that in normal purchasing practices would be purchased in one purchase.
(4) "Sequential purchases" means purchases, made over a period, of items that in normal purchasing practices would be purchased in one purchase.