Forvo: 世界上最大的发音指南

 Forvo是世界上最大的发音指南，在这里你会发现数百万词语的母语发音。

http://zh.forvo.com/

NIST 数学函数手册

NIST Digital Library of Mathematical Functions

awk 教程及一些有用的脚本

Some Useful Gawk Scripts

gnuplot所有的colornames及范例

这里列出gnuplot 4.4所有colorname及其代表的颜色：

white black dark-grey red web-green web-blue dark-magenta dark-cyan dark-orange dark-yellow royalblue goldenrod dark-spring-green purple steelblue dark-red dark-chartreuse orchid aquamarine brown yellow turquoise grey0 grey10 grey20 grey30 grey40 grey50 grey60 grey70 grey grey80 grey90 grey100 light-red light-green light-blue light-magenta light-cyan light-goldenrod light-pink light-turquoise gold green dark-green spring-green forest-green sea-green blue dark-blue midnight-blue navy medium-blue skyblue cyan magenta dark-turquoise dark-pink coral light-coral orange-red salmon dark-salmon khaki dark-khaki dark-goldenrod beige olive orange violet dark-violet plum dark-plum dark-olivegreen orangered4 brown4 sienna4 orchid4 mediumpurple3 slateblue1 yellow4 sienna1 tan1 sandybrown light-salmon pink khaki1 lemonchiffon bisque honeydew slategrey seagreen antiquewhite chartreuse greenyellow gray light-gray light-grey dark-gray slategray gray0 gray10 gray20 gray30 gray40 gray50 gray60 gray70 gray80 gray90 gray100