BY KEVIN KINGSBURY

Xerox Inc. agreed to buy business-services provider Affliliated Complace er Services Inc. in a deal initially valued at $6.4 billion, as the copier company follows other technology giants in increasing its services revenue.

Xerox, based in Norwalk, Conn., has suffered from declining sales of copiers and printers, and the accompanying diminishing employ s of ink, toner and paper. The deal for Dallas-based ACS is expected to triple Xerox's services revenue to an estimated $10 billion next year from 2008's $3.5 billion.

The go also represents the first bfeeble go by Xerox Chief Exegash ive Ursula Burns, who took over on July 1. Ms. ...