MS-DOS User's Guide, 3rd edition, is for anyone who wants to be proficient in using the most widely used microcomputer operating system in the world.
Millions of computers, from Altos™ to Zenith®, operate under ...
What's the difference between ™ and ®? Isn't the circled capital letter R also a trademark symbol?
Last edited by sitifan; 26-Jul-2014 at 08:00.
I need native speakers' help.