You use Steam by valve.
There is a PC version of the game
Buy the Call of Duty Black Ops game, put the game in your PC or game console that has an online connection.
Yes, you can for the PC version with the help of Steam. Steam is pretty much a PC gaming store online.
No. but you can play call of duty blacks online on a PC
You can get it on PC
you can play online with Xbox 360 and the PC. There are also other systems, but the Playstation Network or Xbox live is on the internet and not actually online gaming which Black Ops does not have.
only if your black ops is on pc
No, it's free if you bought the game. If you downloaded it for free (which is illegal) you can't play online.
Unless you have a PC version of the Black Ops game you need to buy them from Playstation Store or from Xbox and you need the Black Ops game to play the 4 Black Ops DLCs that are not just Zombie maps.
you can play online with xbox 360 and the PC. There are also other systems, but the Playstation Network or Xbox live is on the internet and not actually online gaming which Black Ops does not have.
Black Ops
No the disc is for the PS3 only to play the game on a PC you need to purchase the PC game for Call of Duty Black Ops