Typography
is the art and technique of arranging type and type
design.
The arrangement of type involves the selection
of typefaces, point size,
line length, leading (line spacing),
adjusting the spaces between groups of
letters (tracking)
and adjusting the space between pairs of letters (kerning).
There
are thousands of letter types available (typefaces).
They are often
named after the person who designed them. Complete
character sets of a
single size and style of a particular typeface are
called fonts.
A
font (letter type) can be written or typed in upper
case (also known as
capital letters) or in lower case (small letters).
Letters
are made up of basic parts - Stem, Bar, Curve, Continuous
Curve
and Serifs.

Serif
is the traditional typeface and has strokes which
finish off the ends
of bars, stems and curves. Sanserif (sometimes written
as sans - serif) is a
more modern font and doesn't have the extra strokes.
Sans is french,
meaning 'without'.

Serif's
come in various different shapes.
They are Hairline, Slab, Slab Bracketed and Full Bracketted.

Examples
of the most common serif fonts:

Examples
of the most common sanserif fonts:

Fonts
can have different styles applied to them.

A
font is measured in point (Pt) size. The measurement
is taken from the
top of the ascender to the bottom of the descender.

Some
font designs have longer or shorter ascendrs and descenders.
This is why different fonts typed in at the same point
size can seem larger
or smaller than one another.
LEADING
Line
spacing is known as 'leading'. This term comes from
the original lead
printing type sets. A strip of lead was inserted between
lines. Different widths were inserted to create larger
of smaller gaps between the lines of text.

LETTER
SPACING
Letter
spacing is known as 'Tracking'. Letters can be spread
apart or
condensed together for diffetrent effects.

KERNING
Kerning
is sometimes confused with letter spacing, but kerning
is the space between two different letters to correct
visually uneven spacing.
The
word 'WAR' below looks visually wrong when typed normally,
as the 'W'
and 'A' look too far apart. Auto-kerning has been
applied to the second word
and it looks a lot better, but the third word has
been adjusted manually, bringing the 'W' and 'A' much
closer together. This kerning makes the word look
correct.

It
has been proposed that the result of improper kerning
should be called
keming, which is a typographic pun: improper kerning
can result in the adjacent
"r" and "n" being (almost) attached,
so that together they look like the letter "m".
(Ha,
ha!)

WORD
SPACING
Lowecasenletteringnnormallynhasnanspacenthensizenofnansmallnn.
UPPERCASEOLETTERINGOWILLOHAVEOAOSPACEOTHEOSIZEOOFOAOLARGEOO.
NOTE:
There should be one space after a pause in text (,;)
but two spaces after a stop (.!?)