With the computer industry booming and everything needs to connect to the computer. There were a lot of peripherals, but something needed to be designed to connect everything to the computer. Someone did
Universal Serial Bus
USB for short, it connects things like keyboards, mice, printers and other things to the computers. The objective for USB was to improve the user experience for using the computer. With the USB it made a standard connection for everything to connect, ok not the kitchen sink. Well, maybe down the road.
Limitations
Like I said that the kitchen can’t be connected yet. You have to be on the same tabletop or in the same room. You can not connect them across the city or floors. So that is a limitation. There is also a limit on the scanner that requires a bi-directional use of the data pins. It might be good for the printer but not for the scanner.
Speeds
| USB 0.7 | No speed |
| USB 0.8 | No Speed |
| USB 0.9 | Full Speed 12 Mbit/s |
| USB 0.99 | No Speed |
| USB 1.0 -RC | No speed |
| USB 1.0 | Full Speed (12 Mbit/s) Low Speed (1.5 Mbit/s) |
| USB 1.1 | Full Speed (12 Mbit/s) |
| USB 2.0 | High Speed (480 Mbit/s) |
| USB 3.0 | Superspeed USB (5 Gbit/s) |
| USB 3.1 | Superspeed USB 10 Gbit/s |
| USB 3.2 | 10 Gbit/s |
| USB 3.2 | 10 Gbit/s |
| USB 4 | 40 Gbit/s |
What does the future hold
The future of USB will most likely be called USB -C and power computers and become more and more universal between macs and windows OS. They will be able to transfer display over it to power external monitors from your laptops.
I guess we will see.
