Coopers & Lybrand, the accounting firm, estimates that U.S. companies in the information industry will need to put a trillion dollars (for the mathematically inclined, that's $1,000,000,000,000) into capital investments over the next 11 years to realize their maximum potential growth in revenues and productivity. If they can come up with the trillion, Coopers estimates that the industry will double its share of the gross national product by 1995. But, the firm points out, that will put a little strain on corporate resources, as companies try to satisfy this voracious appetite for investment funds, while still finding a few bucks to squander on, say, research and development or working capital.