Printer & DVD?

Question

Four differences between an impact and a non-impact printer ?
Two reasons why there needs to be replacement for the DVD ?
Describe Any two types of operating systems other than windows ?

Answer 1

PRINT stands for "Non-Impact Printer/Plotter for Braille/Moon and Tactile Graphics". Going through those terms one by one may help explaining what the aims of PRINT are. "Non- impact" means PRINT is about an actual tactile printer, rather than an embosser. In fact the device under developments works much like a conventional ink-jet printer

I recommend DVD-R for compatability reasons, although there are players that prefer DVD+R too. ... but for your needs this one would probably do just fine. ...

WinFS was a data storage and management system based on relational databases, developed by Microsoft from 2003 to 2006 for use as an advanced storage subsystem for the Microsoft Windows operating system. It has since been cancelled as a separate product, and some of its technologies will be moved into future versions of ADO.NET and Microsoft SQL Server.[1]
WinFS is the code name of the system, and is short for Windows Future Storage.

Answer 2

impacts uses ribbon, non impact uses ink/toner
impacts are noisy, non impact may be not noisy
impacts can use carbonized paper, non impact can't
impact print heads smack ink out of ribbon. non impact squirt / fuse

because there will always be more data than media
because dvd has a life limit

linux is a useful o/s that, when it crashes, you can only blame yourself.
mac tiger is great if you're not into games.