I can:

• Accomplish damn near anything from a command line
• Write machine code
• Remember a fairly broad swath of special character altcodes without looking them up
• Disassemble damn near any computer or other machine, and stand a good chance of putting it back together

But also:

• Use modern programming languages, including object oriented paradigms
• Actually read what is on my screen and comprehend it, including error messages
• Understand and operate any arbitrary interface without having to have it explained to me by rote

Behold my mixture of skills, and tremble.