Designed to be the most readable possible for a 5 pixel of height font for lowercases and 7 for uppercases.
Feel free to comment, espacially if you find any lacks, anything to improuve.
For a better result, stick to a multiple of 16px (16, 32, 48, 64, 80...).
Use capital letters for an extended version of each letters.
Designed to be the smallest, still readable, font ever !