2001:
- a number
- a year
- a movie, use the 2001_A_Space_Odyssey tag instead
Use this tag when either the image has "2001" written somewhere on it, or it makes a reference to the year 2001. Also use this tag when 2001 appears as a tag when searching through pixiv.
Year 
Edit
2001 is the year of the snake.
castlevania:_circle_of_the_moon was released in 2001.
https://download.driverguide.com/driver/1394+Net+Adapter/VIA/d124538.html
http://www.geekstogo.com/forum/topic/263250-fresh-xp-install-no-internet-connection/
Details Edit
Something from 2001:
Win xp sp2 video card 1394 net adapter July 2001 V 5.1.2535.0
