Tech Sector's Mixed Signals (washingtonpost.com) washingtonpost.com - The tech sector can't pop open the bubbly yet, since pink slips are flying and shipping jobs overseas is as en vogue as 1980s fashion trends. But there are signs of growth that give reason to at least put the champagne on ice, with PC sales rising and small businesses planning to plunk down serious cash on technology purchases, according to a new batch of studies.