Source: https://youtu.be/-6g1tD66QBA

Bit blitting is the process of combining two or more bitmaps using boolean operations. This technique became popular with the Amiga home computer series, and the 'Blitter' dubbed chip enabled a number of hardware accelerated graphics effects, that were simply not possible on older 8-bit systems - at least not in hardware.

Computerphile a sister project of Numberphile recently looked at the mechanisms behind bitblitting. And even though the technique is not used anymore in modern day graphics hardware, it is quite an interesting topic to get into. Enjoy the video.