This is what I know and work with professionally...
Windows 9x/2k/xp/server/ad/exchange
Linux - I run SUSE 10.1 on my desktop at work and my laptop
DOS - I use it for boot disks
Novell - netware 6.5 servers throughout my work, all windows boxes are bound to NDS
OS X/classic and yes i actually have apple certifications
Hardware repair certs - apple, HP accredited specialist (enterprise products), HP laser printer, Epson, Canon, Gateway, and Sony (though I barely ever work on laser printers, even though I passed the certification so I am not really a practicing tech when it comes to that stuff, I need a service manual to diagnose them). I fully understand how OSes, memory management, hardware, etc work, but I couldn't design a motherboard in auto cad inventor or anything like that.
I can repair/configure just about anything that is set in front of me. Some items may require some research for me to implement it properly, but in the end i can get it done.
I have video producers and digital audio recording studios as clients for my side work.
What I don't know:
Programming - umm I can write a script LOL and thats it
Video Editing (though I build RAID rigs all the time for video editors)
Audio Editing (i can build a studio no prob tho)
Web developement (but I do know a bit of HTML, Java, and CSS, but am no way a dev)
Grahpic arts - ya i suck at photoshop compared to actual graphic artists
Hardware developement
Applications - I by no way am familiar with every app out there, there are tons I don't know
Database work - I hate data base work, and find it utterly boring, but I did learn MYSQL kind of a while ago with PHP, but I used templates
various - I am sure there are plenty of little various things I do not know at all I can't think of any off the top of my head, but that is beacuse I don't know them, lol
Bottom line, you can't generalize computer knowledge into one category. I mean do companies have one guy for IT, helpdesk, admin, developement, database, networking, repair etc? No, they departmentalize because it would be impossible for one person to actually learn all that stuff.
If you are trying to figure out people's expertise on this forum, perhaps make it by category
Examples:
Grahpic Design/Computer Animation
Database Programming
Software Developer
Hardware Repair
Hardware Developer
Software/Applications (basic useage, internet/email burn cds)
Networking/Security
Production software suites (ie office apps, dvd authoring software, post design stuff)
Web Developement
Technical writer
The list could go on and on.
As for myself I would rate myself as a constant learner, and I also don't specialize in any one specific field. I am a jack of all traits and master of none, or perhaps a master of intergration. I don't think there is a numerical value I could rate myself with honestly.
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