Fonts

Serif Sans serif
has serifs. and usually strokes thick and thin. no serifs. and usually strokes same width.
serifs supposedly make it easier to read. Hi-res media, i.e. printed books, magazines, newspapers serifs don't work well on low-resolution media like screens, so most text on computers use sans-serif fonts
Georgia
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890


Times New Roman
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890


Garamond
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890


Cambria
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890


Courier (monospaced)
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890
Verdana
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890


Helvetica
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890


Arial
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890


Calibri
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890


Consolas (monospaced)
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890


Aptos (N.A.!)
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890




NB. your browser might not have all of these fonts. In which case it defaults to its generic serif or sans-serif font.
Your browser's default/generic serif font:
abcdefghijklmnopqrstuvwxyz
ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890
Your browser's default/generic sans-serif font:
abcdefghijklmnopqrstuvwxyz
ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890

Proportional font's characters use width as they need:
iiiii
MMMMM

Monospaced font's characters are all the same width:
iiiii
MMMMM

Roman square capitals:

majuscule: Big and all same height.
minuscule: Small and not all same height.