Shares of the PC makers were feeling the after-effects of

Dell's

(DELL) - Get Report

warning earlier today, as many of the industry leaders slipped during the trading session.

Dell

warned that its earnings for the fourth-quarter would come in between 18 cents and 19 cents, well below Wall Street's estimates of 25 cents a share for the period. Dell attributed the shortfall to a slowing global economy and a slowing demand for its products.

Compaq

(CPQ)

lost 94 cents, or 4.6%, to $19.56, and

Hewlett-Packard

(HWP)

was down $1.63, or 4.6%, to $34.13 in recent

New York Stock Exchange

trading.

IBM

(IBM) - Get Report

dropped $2.50, or 2.3%, to $108.75 and

Gateway

(GTW)

fell $1.88, or 7.9%, to $21.82 on the Big Board.

Dell slid 31 cents, or 1.2%, to $25.31, and

Apple

(AAPL) - Get Report

fell 69 cents, or 3.5%, to $18.81 on the

Nasdaq

.