Oct 6 (Reuters) - A U.S. House of Representatives panel looking into abuses of market power by four of the biggest technology companies found they used "killer acquisitions" to smite rivals, charged exorbitant fees, and forced small businesses into "oppressive" contracts in the name of profit.

The scathing 449-page report describes dozens of instances where Alphabet Inc's Google, Apple Inc, Amazon.com and Facebook misused their power, revealing corporate cultures apparently bent on doing what they could to hold on to their dominance over large portions of the internet. (Reporting by Nandita Bose and Diane Bartz; Editing by Edward Tobin and Leslie Adler)