Make the background of a picture to be transparent

http://office.microsoft.com/en-us/word-help/change-the-brightness-contrast-or-transparency-of-a-picture-HA010198873.aspx

introduction to nasm

http://leetcoders.org/showthread.php?t=6388

Beep on PC

http://hi.baidu.com/albertdiao/blog/item/71b16562c7def3cd8cb10d68.html (Chinese version, assembly)

http://www.frank-buss.de/beep/index.html (user level)

highlight assembly language syntax on Gedit

save the following file http://bugzilla.gnome.org/attachment.cgi?id=45158&action=view as asm.lang,
put it into /usr/share/gtksourceview-2.0/language-specs

ref: http://forum.ubuntu.org.cn/viewtopic.php?f=97&t=82293

Note: works for a complete assembly source file. Does not work on gcc inline assebmly mixed with C.