1. local terminal, cd, mkdir, echo, echo > foo, rm, cp, mv
2. emacs, cat
3. ssh-keygen, ssh, rsync
4. html, head, body, title, b, p, hr, center
5. ol, ul, li, table, th, tr, td
6. img src, a href
7. script, if, else, console.log, F12
8. function, recursion
9. input, button
10. canvas, pixels, colors
11. mandelbrot