If you have one of the original series of iMacs (233mhz, 266mhz or 333mhz) this site can help you perform three relatively easy upgrades that will help you get the most out of your computer. With a RAM Upgrade your computer will run smoother and faster. You will also be able to run more applications at the same time. With a Hard Drive Upgrade you can install a quieter, faster and much larger hard drive. There is also a section on how to change the PRAM battery. Please read my disclaimer then use the links below to go directly to each procedure.