How many binary digits make one byte?

The byte is the smallest sized information that a computer works on, for example to do math or to write text. Originally computers used bytes that were 8 binary digits (bits) but the larger the byte the more can be done with each computer step computer, so soon there were 16-bit, 32-bit and 64-bit etc. computers. So the size of the byte depends on the computer, and are getting larger all the time.