Back in the late nineties, I-B-M brought in more revenue than any other U.S. tech company on the Fortune 500. This year, the tech giant generated 79-point-6 billion and landed at number 38 on the list. But it trails four other tech giants by revenue in its sector: Apple, Alphabet, Microsoft and Dell. To give you a sense of just how much the competition has changed--this year’s number 15 on the list--Alphabet--- didn’t even exist until 1998.