Updated from 1:11 p.m.

Shares of

Unova

(UNA)

were among the best-performing technology stocks Tuesday, rising 30.8% after the company posted third-quarter earnings and sales above Wall Street expectations.

Excluding items, the supplier of wireless equipment posted earnings of 11 cents a share on sales of $316.7 million. Analysts surveyed by Thomson First Call were expecting earnings of 4 cents a share on sales of $307.7 million. A year ago, the company earned 7 cents a share on sales of $278 million. Shares traded up $4.71 to $20.

SRA International

(SRX)

rose 11.5% after the company posted strong first-quarter results that easily surpassed expectations and said that its second-quarter results would top expectations. The provider of IT services posted a profit of 45 cents a share on sales of $203.5 million. Analysts were expecting earnings of 39 cents a share on sales of $180 million. Looking ahead, the company forecast second-quarter earnings of 44 cents to 46 cents a share on sales of $197 million to $202 million. Analysts had been expecting 42 cents a share on sales of $180.9 million. Shares traded up $6 to $58.25.

Shares of

Primus Telecommunications Group

(PRTL)

rose 25.7% after the company posted third-quarter earnings and sales that were above expectations. Excluding one-time gains, the telecom company earned 4 cents a share on sales of $334.3 million. Analysts were expecting a loss of 6 cents a share on sales of $323.7 million. Looking ahead, Primus said fourth-quarter sales should be comparable to third-quarter results. Analysts are expecting fourth-quarter sales of $325 million. Shares traded up 48 cents to $2.35.

National Semiconductor

(NSM)

fell 1.7% after the company warned that its second-quarter sales would fall short of expectations. The semiconductor company now expects sales of $445 million to $450 million, which is 18% to 19% below what it posted during the first quarter. Previously, the company said that second-quarter sales would fall 8% to 10% from first-quarter levels. Gross margins are now expected to range from 49% to 50%, down slightly from National Semi's previous forecast of 51%. The company said that inventory adjustments and lower-than-typical seasonality contributed to the lowered second-quarter outlook. Second-quarter earnings results are scheduled for Dec. 9. Shares traded down 29 cents to $16.40.

Shares of

Xybernaut

(XYBR)

rose 6.8% after the company announced a contract to supply one of the world's largest grocery chains with its wearable computers. As part of the deal,

Tesco

, the largest grocery chain in the United Kingdom, agreed to purchase and deploy several thousand Xybernaut Atigo mobile/wearable computers that are expected to bring in more than $9 million in sales to Xybernaut. Xybernaut said that sales associated with the deal would primarily be recognized during the quarters in which the products are delivered. The company has already started shipping units, it said. The initial order calls for more than 1,300 Atigo units to be deployed to more than 300 grocery stores. Shares traded up 8 cents to $1.26.

Other technology volume leaders included

Microsoft

(MSFT) - Get Report

, up 16 cents to $28.24;

Intel

(INTC) - Get Report

, up 17 cents to $22.61;

Sirius Satellite Radio

(SIRI) - Get Report

, up 5 cents to $3.96;

Applied Materials

(AMAT) - Get Report

, up 26 cents to $16.25; and

Lucent

(LU)

, up 6 cents to $3.59.