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What is the difference between / dev / uinput and / dev / input on Linux?

I see that both / dev / uinput and / dev / input exist in my Ubuntu and they are similar. They can be used to detect / simulate a key / mouse / touch event. So I'm confused by what is the difference between the two? Thank!

New added: Yes, I know that / dev / input is a directory, and it contains as event0 ~ 6, and some of them are a key / mouse / touch or something else. I still want to know why uinput and input / eventX exsit together. Why and what is the difference?

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/ dev / uinput probably means user input. On mine, / dev / input is a directory containing event labels

pwadas@vao:~$ ls -al /dev/uinput /dev/input/ | sed -e 's/^/    /g'

crw------T 1 root root 10, 223 wrz 18 07:09 /dev/uinput

/dev/input/:
total 0
drwxr-xr-x  4 root root    460 wrz 18 07:09 .
drwxr-xr-x 14 root root   3660 wrz 18 07:09 ..
drwxr-xr-x  2 root root    120 wrz 18 07:09 by-id
drwxr-xr-x  2 root root    160 wrz 18 07:09 by-path
crw-------  1 root root 13, 64 wrz 18 07:09 event0
crw-------  1 root root 13, 65 wrz 18 07:09 event1
crw-------  1 root root 13, 74 wrz 18 07:09 event10
crw-------  1 root root 13, 75 wrz 18 07:09 event11
crw-------  1 root root 13, 76 wrz 18 07:09 event12
crw-------  1 root root 13, 77 wrz 18 07:09 event13
crw-------  1 root root 13, 78 wrz 18 07:09 event14
crw-------  1 root root 13, 79 wrz 18 07:09 event15
crw-------  1 root root 13, 80 wrz 18 07:09 event16
crw-------  1 root root 13, 66 wrz 18 07:09 event2
crw-------  1 root root 13, 67 wrz 18 07:09 event3
crw-------  1 root root 13, 68 wrz 18 07:09 event4
crw-------  1 root root 13, 69 wrz 18 07:09 event5
crw-------  1 root root 13, 70 wrz 18 07:09 event6
crw-------  1 root root 13, 71 wrz 18 07:09 event7
crw-------  1 root root 13, 72 wrz 18 07:09 event8
crw-------  1 root root 13, 73 wrz 18 07:09 event9
crw-------  1 root root 13, 63 wrz 18 07:09 mice
crw-------  1 root root 13, 32 wrz 18 07:09 mouse0
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: http://thiemonge.org/getting-started-with-uinput : " uinput - Linux, .. . /dev/input. , .

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