http://faculty.weber.edu/tmathews/grammar/Compmark.html

"Symbols separated by a coma..."

comma

http://blacklys.com/

"Save your eye: blacklys.com uses cool color varitions best for humman eye. How computer harm your eye? . . .
If every one use black google 'blacklys.com' for searching, we can save 750 Megawatt-hours a Year"

eyes
variations
the
human
How can/does/will a computer harm your eyes?
everyone
uses
per