PNG ICO MORE
24x24 Free Application
Close, cancel, no entry
Red
24x24
PNG MORE
Business & finance
Glyph
24x24 Free Application Icons
Minus, Closed, glossy
Exit, delete, Negative
stop, no access, remove
PNG ICO ICNS MORE
Network & communications
Pixel
16x16 Free Application Icons
no, Exit, delete
16x16
Minus, sign, forbid
Desktop apps
3D
Free Applications Icons
no entry, restricted, forbidden
Minus, forbid, restrict
no entry, unable, Exit