Updated from 1:56 p.m. EDT

Shares of Intrusion ( INTZ) were among technology's winners Tuesday, rising 56.5% after the company received an $800,000 contract from the U.S. Army Directorate of Information Management at Fort Hood.

Intrusion will provide its SecureNet intrusion detection/prevention and SpySnare spyware prevention systems to the Fort Hood facility, which is located in Texas. According to the company, the order was shipped in December. Intrusion also announced that Fort Hood is implementing the company's Security Status Review program as well. Shares traded up $1.58 to $4.38.

Tecnomatix Technologies ( TCNO) rose 9.9% after the software company agreed to be acquired by UGS for about $228 million in cash. The $17-a-share price represents a 39% premium to Tecnomatrix's average closing price for the past 60 trading days. The deal is expected to close by the end of the first quarter of 2005. Shares traded up $1.51 to $16.70.

Shares of Mobius Management Systems ( MOBI) fell 10.9% after the company lowered its second-quarter financial outlook. The software company now expects to post a loss of 7 cents to 9 cents a share on sales of $17.5 million to $18 million. Previously, the company expected earnings of 2 cents to 7 cents a share on sales of $22 million to $24 million. Analysts polled by Thomson First Call had been expecting earnings of 4 cents a share. The company expects to release second-quarter results on Jan. 26. Shares traded down 81 cents to $6.60.

Integrated Silicon Solution ( ISSI) fell 5% after the company warned that first-quarter sales would come in below previous guidance. The semiconductor company now expects to post sales of $30 million to $31 million. What's more, it also expects to report a loss during the quarter. Analysts had been expecting a loss of 15 cents a share on sales of $33.9 million. Shares traded down 39 cents to $7.49.

Shares of Pegasystems ( PEGA) fell 8.9% after the company lowered its 2004 financial outlook and announced the resignation of its chief operating officer, Henry Ancona. The software company now expects results to fall at the low end or slightly below its previous guidance of $11 million to $17 million in earnings before taxes on sales of $95 million to $103 million. Analysts are expecting full-year earnings of 19 cents a share on sales of $96.1 million. As for the resignation, Ancona's departure is effective immediately; Alan Trefler, the company's CEO, will assume Ancona's responsibilities. Shares traded down 76 cents to $7.77.

Other technology volume leaders included Sun Microsystems ( SUNW), down 48 cents to $4.63; Microsoft ( MSFT), up 10 cents to $26.84; Cisco ( CSCO), down 76 cents to $18.56; Intel ( INTC), down 46 cents to $22.61; Oracle ( ORCL), down 35 cents to $13.06; and Sirius Satellite Radio ( SIRI), up 3 cents to $7.51; and Lucent ( LU), down 6 cents to $3.72.