Verified answer

Those letters are made with a small group of building blocks in the ASCII character set. To get them, do the following:

(This should work in any Windows word processor, text editor, browser or email client.)

1. Make sure your keyboard is in NumLock mode.

2. Hold down the ALT key and enter the number on the numeric keypad. (Note that many laptops have a blue FN key that changes a set of keys, also with blue numbers on them, into a numeric keypad.)

for █ 219

for ▄ 220

for ▌ 221

for ▐ 222

for ▀ 223

Hope that helps.

http://www.network-science.de/ascii/