Extra trading was fairly quiet Wednesday following

a wild regular session that saw the major averages stage a big comeback after a sharp drop in the first half of the day.

Widely held technology stocks were dominating the volume leader board after the close.

Sun Micro

(SUNW) - Get Report

, the most active stock during regular trading, was up 0.1% to $6.97 following a 15% decline at the 4 p.m. EDT close.

Oracle

(ORCL) - Get Report

was ticking up 0.4% to $9.49, and

WorldCom

(WCOM)

was flat.

Overture Services

(OVER)

slipped another 0.2%, following a 36% dive in regular trading.

In the first hour of extended trading, around 1.6 million shares changed hands among the top-20 volume movers on the Instinet platform.

Among the big winners,

O2Micro

(OIIM) - Get Report

was up 6.3% to $16 after the company posted first-quarter earnings of 8 cents a share as sales rose 83% from the same period a year earlier.

SangStat Medical

(SANG)

was rising 5.7% to $25 on the heels of its quarterly report. The company posted a profit in the first quarter, reversing a loss in the year-ago period, and raised its guidance for the second quarter.

H&R Block

(HRB) - Get Report

was gaining 2.8% to $41.11 after the tax preparation company said 2002 results will be in line with expectations and that 2003 numbers will be better than predicted.

Several stocks with news after the close were struggling, including

priceline.com

(PCLN)

, which fell 7.6% to $4.85 after the company reported disappointing revenue for the first quarter. The company also said its second-quarter top line would fall short of the consensus estimate.

Protein Design Labs

(PDLI) - Get Report

was sliding 7.7% to $16 on word that co-founder Laurence Jay Korn is resigning as chief executive. He will remain chairman. The company also said Daniel Levitt resigned as president of research and development.

Meanwhile,

PacifiCare Health

(PHSY)

was losing 3.8% to $30.50. After the close, the company posted a big quarterly loss if a goodwill writedown was factored into the numbers.