Welcome to brain Stuff. From How Stuff Works Pay Brain Stuff Lauren Volga bam Here, who invented the first computer. One could argue that the abacus was the first computer, or its descendant, the slide rule, invented by William Outred in sixteen twenty two, but the first computer resembling today's modern machines was the analytical Engine, a device conceived and designed by British mathematician Charles Babbage between eighteen thirty three
and eighteen seventy one. Before Babbage came along, our computers were people who sat around all day adding and subtracting numbers and entering the results into tables. The tables then appeared in books so that other people could use them to complete tasks such as launching artillery shells accurately or calculating taxes. It was in fact, a mammoth number crunching
project that inspired Babbage in the first place. Napoleon Bonaparte initiated the project in seventeen ninety when he ordered to switch from the old Imperial system of measurements to the new metric system. For ten years, scores of human computers made the necessary conversions and completed the tables. Monapart was never able to publish the tables, however, and they sat
collecting dust in the Academy the Sciences in Paris. In eighteen nineteen, Babbage visited Paris and viewed the unpublished manuscript with page after page of tables. If only, he wondered, there was a way to produce such tables faster, with less manpower and fewer mistakes. He thought of the many marvels generated by the Industrial Revolution. If creative and hard working inventors could develop the cotton engine and the steam locomotive,
then why not a machine to make calculations. Babbage returned to England and decided to build just such a machine. His first vision was something he dubbed the difference engine, which worked on the principle of finite differences, or making complex mathematical calculations by repeated addition without using multiplication or division. He secured government funding in eighteen twenty four and spent
eight years perfecting his idea. In eighteen thirty two, he produced a functioning prototype of his table making machine, only to find his funding had run out. Some people might have been discouraged, but not Babbage. Instead of simplifying his design. To make the difference Engine easier to build, he turned his attention to an even grander idea, the Analytical Engine, a new kind of mechanical computer that could make even
more complex calculations, including multiplication and division. The basic parts of the Analytical Engine resemble the components of any computer sold on the market today. It featured two hallmarks of any modern machine, a central processing unit or CPU, and memory a Babbage, of course, didn't use those terms. He called the CPU the mill and the memory the store. He also had a device, the reader, to input instructions, as well as a way to record on paper results
generated by the machine. Babbage called this output device a printer, which makes perfect sense to me. Babbage's new invention existed almost entirely on paper. He kept voluminous notes and sketches about his computers, nearly five thousand pages worth, and although he never built a single production model of the Analytical Engine, he had a clear vision about how the machine would
look and work. Borrowing the same technology used by the Jacard Loom, which was a weaving machine developed in eighteen o four that made it possible to create a variety of cloth patterns automatically. Babbage's data would be entered on punched cards. Up to one thousand, fifty digit numbers could be held in the computer's store. Punched cards would also carry the instructions which the machine could execute out of
sequential order. A single attendant would oversee the whole operation, but steam would power it, turning cranks, moving cams and rods, and spinning gear wheels. But if Babbage was a genius behind the Analytical Engine, then Augusta Ada Byron or Ada Lovelace was its publicist and arguably the very first computer programmer. She met Babbage at a party when she was seventeen and became fascinated by the idea of the analytical Engine.
From that chance meeting grew a strong dynamic relationship. Lovelace was gifted in mathematics and offered Babbage numerous insights. In eighteen forty three, she published an influential set of notes describing the Analytical Engine. She also added in some stage predictions, calculating that Babbage's mechanical computers might one day act upon other things besides numbers, and even compose elaborate and scientific
pieces of music of any degree of complexity. Unfortunately, the technology of the day could not deliver on their ambitious designs. It wasn't until nineteen that their particular ideas were finally translated into a functioning computer. That's when the Science Museum in London built to Babbage's exact specifications a Difference Engine.
It stands eleven feet long and seven feet tall that's about three meters long and two meters tall, contains eight thousand moving parts and ways fifteen tons or just over thirteen and a half metric tons. A copy of the machine was built and shipped to the Computer History Museum in Mountain View, California, where it remained on display until December. Neither device would function on a desktop, but they are no doubt the first computers and precursors to the modern
in PC. Today's episode was written by William Harris and produced by Tyler Clang. For more on this and lots of other analytical topics, visit our home planet, how Stuff Works dot com.