Only if you BYOD. If you get the IT computers (large bludgeoning devices with power bricks to match), then they're of course billed to your cost center and refreshed periodically. At refresh time you get your choice of like 3-4 models, but on initial hire your manager will just pick something for you.
So here's the BYOD pitch:
1) Pay for your own computer, making sure it has Windows Ultimate or Enterprise. Stipends were determined to not have the right ROI, so it's all out of pocket.
2) IT will install all the security software so you can get it on the production network (I actually think it's wiped and the corporate Windows Enterprise is put on, which is why you needed to buy it in the first place--otherwise the license isn't valid)
3) Support your own computer. IT has loaners if you need to send it off for warranty support or whatever
4) You get to mix work and home stuff on the same computer!
4% of the employee base has apparently taken them up on this offer, based on a public whitepaper I found about it..