This is all I have to say (full version):

I think there is a world market for maybe five computers." -- Thomas Watson, chairman of IBM, 1943.
"Where a calculator on the ENIAC is equipped with 18,000 vacuum tubes and weighs 30 tons, computers in the future may have only 1,000 vacuum tubes and weigh only 1.5 tons." -- Popular Mechanics, 1949
"I have traveled the length and breadth of this country and talked with the best people, and I can assure you that data processing is a fad that won't last out the year." -- The editor in charge of business books for Prentice Hall, 1957.
"But what...is it good for?" -- Engineer at the Advanced Computing Systems Division of IBM, 1968, commenting on the microchip.
"There is no reason anyone would want a computer in their home." -- Ken Olson, president, chairman and founder of Digital Equipment Corp., 1977.
"640K ought to be enough for anybody." -- Attributed to Bill Gates, 1981, but believed to be an urban legend.
"This 'telephone' has too many shortcomings to be seriously considered as a means of communication. The device is inherently of no value to us." -- Western Union internal memo, 1876.
"The Americans have need of the telephone, but we do not. We have plenty of messenger boys." -- Sir William Preece, chief engineer of the British Post Office, 1876.
"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?" -- David Sarnoff's associates in response to his urgings for investment in the radio in the 1920s.
"While theoretically and technically television may be feasible, commercially and financially it is an impossibility." -- Lee DeForest, inventor.
"The concept is interesting and well-formed, but in order to earn better than a 'C', the idea must be feasible." -- A Yale University management professor in response to Fred Smith's paper proposing reliable overnight delivery service. (Smith went on to found Federal Express Corp.)
"Who the hell wants to hear actors talk?" -- H. M. Warner, Warner Brothers, 1927.
"I'm just glad it'll be Clark Gable who's falling on his face and not Gary Cooper." -- Gary Cooper on his decision not to take the leading role in "Gone With the Wind."
"A cookie store is a bad idea. Besides, the market research reports say America likes crispy cookies, not soft and chewy cookies like you make." -- Response to Debbi Fields' idea of starting Mrs. Fields' Cookies.
"We don't like their sound, and guitar music is on the way out." -- Decca Recording Co. rejecting the Beatles, 1962.
"Radio has no future. Heavier-than-air flying machines are impossible. X-rays will prove to be a hoax." -- William Thomson, Lord Kelvin, British scientist, 1899.
"So we went to Atari and said, 'Hey, we've got this amazing thing, even built with some of your parts, and what do you think about funding us? Or we'll give it to you. We just want to do it. Pay our salary, we'll come work for you.' And they said, 'No.' So then we went to Hewlett-Packard, and they said, 'Hey, we don't need you. You haven't got through college yet.'" -- Apple Computer Inc. founder Steve Jobs on attempts to get Atari and HP interested in his and Steve Wozniak's personal computer.
"If I had thought about it, I wouldn't have done the experiment. The literature was full of examples that said you can't do this." -- Spencer Silver on the work that led to the unique adhesives for 3-M "Post-It" Notepads.
"It will be years -- not in my time -- before a woman will become Prime Minister." -- Margaret Thatcher, 1974.