Abacus Engineered Systemscontinues to be a leading provider of facility engineering and energy solutions in the Pacific Northwest, with more than $34 million in sales for 2004. Schneider Electric, the power and control specialist, acquired Seattle-based Abacus in late 2004. Schneider merged Abacus with the Energy Solutions division of TAC, a Schneider-owned leader in building automation, security systems and energy solutions.