In 1969 computer chips had not been invented. The maximum computer memory was 256k, and this was housed in a large air conditioned building. In 2002 a top of the range computer requires at least 64 Mb of memory to run a simulated Moon landing, and that does not include the memory required to take off again once landed. The alleged computer on board Apollo 11 had 32k of memory. That's the equivalent of a simple calculator.
As has been pointed out, they were invented.
A colleague has a set of mask layers that he designed by hand for a microprocessor (IIRC in1968), in the UK. About 18" from my monitor at work. (It is quite a good reminder what can be achieved *without* computers).
Several other people have mantioned this, BUT WHY WOULD THE SOVIETS KEEP QUIET,
According to Neil Armstrong's Biography First Man: The Life of Neil A. Armstrong (Hardcover) by James R. Hansen (Author) the Soviets tried to draw attention away from the mmn landings with their own moon shot, of an unmanned probe during the mission.
Neil Armstrong also discusses the creation of a digital flight simulator for the moon landing.
A true scotsman would be interested enough to read this book ;-)
(seriously, it is worth reading)
Many people seem to assume that because certain tasks are
quicker with compters, they are impossible without them.
Face it, the first atom bombs were designed without modern computer simulations.
How many people would be needed to keep it a secret, and why wern't the ideological enemies of the US revealing this. The KGB seemed fairly good at finding other secrets. And how many patriotic Americans would have to be kept quiet? Are that many Americans never likely to talk; or would some consider it their duty to free speech to reveal the cover-up?
Maybe the Soviets were actually colluding with the US in the secret world government, and Kennedy was about to reveal this, which is why he was assasinated.
Logistically it would be simpler to actually get to the moon than fake it.
Disclosure of interest
I believe in geostationary satellites.
And in the cock-up theory of history. (Anyone who has worked in/with a large organisation would understand). Secrets come out, unless there is a
really good reason not to.