Computing related knowledge is so important today, that deserves it's own page. I've clasified this knowledge in three main areas: Operating Systems, Programming Languages, and Software Packages.
Operating Systems engulfs the different operating systems I'm very familiar with, and in most cases operating systems I've programmed for.
In Programming Languages, apart from just that, I've highlighted some technologies needed for particular uses, like DOM.
And Software Packages are applications wich I have used, grouped by families.
Operating Systems
Mac OS 6.x-9.x
Windows 3.x/9x/NT/2000/XP
Unix: Mac OS X, Linux, Solaris, SunOS, Iris; X11, KDE, CDE, Gnome environments
Palm OS 2.x-6.x
Windows CE, PocketPC, Windows Mobile
Programming Languages
C/C+, Objective-C/C++, Java 2
bash, Tcl/Tk, Perl, Python
Visual Basic, REALbasic
HTML, XHTML, CSS, DOM, JavaScript
XML-RPC, SOAP, Web Services
Intel x86 y 68000 Assembler
80x51, ColdFire uC Assembler
GRAFCET (PLCs)
Software Packages
CodeWarrior, Project Builder, Xcode, Eclipse, Visual Studio
Mathematica, Maple, MATLAB, Simulink, LabView, Scilab, Octave
SPSS, Entryware Pro
Cadence, Medici, PSPice, Spice3f, gnucap, hSpice, Verilog
PhotoShop, GIMP, Illustrator, FreeHand, Indesign, QuarkXPress, FrameMaker
Final Cut Express, DVD Studio Pro, iLife
MS Project, MS Office, MS SQL Server, FileMaker Pro