Live Statistics Check your typing speed and accuracy as it is updated and displayed every second while you type. Personalize and Save Report Report can be personalized with your name and your results can be saved and shared easily using the link generated at the end of every test.
CDR means compact disc-recordable. Like most compact discs, CDRs can only store somewhere between 700-800MB of data. The unique thing about them is that they can only be used for recording once. After that, it is a read-only disc. As such, whatever you will record on a CDR will remain unchanged forever.
CD-RW. A CD-RW is a rewritable optical disc. It was introduced in 1997, and was known as CD-Writable during development. It was preceded by the CD-MO, which was never commercially released. CD-RW disc require a more sensitive laser optics.Also, CD-RWs cannot be read in some CD-ROM drives built prior to 1997.CD-ROM drives will bear a MultiRead certification to show compatibility.t was preceded by the CD-MO, which was never commercially released. CD-RW disc require a more sensitive laser optics. Also, CD-RWs cannot be read in some CD-ROM drives built prior to 1997. CD-ROM drives will bear a MultiRead certification to show compatibility.