Hrvatska seljacka stranka Croatian peasant party, strongest Croatian party in Kingdom of Yugoslavia

Tool hire. The most expensive around with lots of hidden extras when you return the equipment. http://www.hss.co.uk

Head Slap Society. A group within the CyberStitchers group, having no extra meetings or Yahoo Groups. You're a member if you sometimes smack your forehead and say, "Duh!"

HyperSonic Sound

or Humanities & Social Sciences Library, former name of the Matheson Library. Also previously known as Main Library. Building 4 on the Clayton campus.

High Speed Synchronization Permits using the flash with shutter times that are higher than the X-sync shutter speed of the camera.

High Speed Steel

A type of hardened steel that is not too expensive to produce. It is less hard and less expensive than cobalt steel, tungsten carbide, or diamond.

Helicopter Support Ship

Health Services Section (BQA)

health services support

helmet sight subsystem

Home Service Store

Home Subscriber Server. In IMS networks, the HSS interfaces with the home location register (HLR) databases to maintain a subscriber's profile including presence and applications information..