Vacuum cleaner
The vacuum cleaner evolved from the carpet sweeper via manual vacuum cleaners. The first manual models, using bellows, were developed in the 1860s, and the first motorized designs appeared at the turn of the 20th century, with the first decade being the boom decade.
Vacuum tube computer
The Atanasoff–Berry computer, a prototype of which was first demonstrated in 1939, is now credited as the first vacuum tube computer. However it was not a general-purpose computer being able to only solve a system of linear equations and it was also not very reliable.