There is, as anyone who gets on the 'net will know, a blizzard of information out there. The fact is that there is no way in which it might be categorized. It was Babbage who receives the credit for inventing the calculating machine, indeed, the first computer, which can still be seen at the Science Museum, London. Babbage's calculating machine, once it was set up and started, by a thinking person, would perform without the exercise of any further thought or volition. The electronic digital computer of these days is basically a calculating machine, with the difference that the speed of calculation has been enormously increased.
Computers are now generally in use at our libraries.
Still it is necessary to fill out electronic index cards. A flood of information will come to the computer operator at the library. A careful selection of the search criteria is most certainly required or the researcher will be overwhelmed. Now, what is available at the local library has limitations as to what it has on its shelves, even assuming it has unlimited funds to buy library material. At least, the material to be found at a typical library has been picked, hopefully by a liberal minded person with a sense of what is important and what is not.