I believe my question title is somewhat similar to this (Should I link my research in my SOP?). However I would wish to elaborate my situation. I would be applying to the Computer Science Programs in a few Graduate Schools. I come from a Computer Science background. Can I provide hyperlinks in my SOP to online accounts on portals like github(which is an online project hosting site),TopCoder(a Sports Programming portal),etc. I believe mentioning the above would definitely be an add on to my application.