.Nervousness!!! O_O

.I've been checkin' out classified ADs lately on which programming languages and softwares most IT companies need lately. And here are the most things I see:

• C
• C++
• Java
• JQuery
• ASP.net
• PHP
• MySQL
• HTML
• CSS
• Photoshop
• Flash
• Linux
• JavaScript
  

.And after compiling these... I froze. I think I only know about 6-7 of the things listed but am not really proficient in. O_O Waaaaaaaaaaaaa nervous break down!