All but one of the tech companies in the S&P 500 has reported earnings for the September quarter, closing the door on a difficult Q3. Analog Devices (ADI), which is slated to release its results on Tuesday, is the last of the 72 information technology companies in the S&P 500 to report. It's been a below-average quarter for tech, according to numbers compiled by Thomson Reuters. IBM (IBM) sort of set the tone Oct. 17 with a rare sales miss. Here