Types of pencils

The key types are

• Graphite pencils for office, school & home use
• Color pencils for school, home or artist use
• Carpenter pencils
• Cosmetic make-up pencils

The major sub-categories of graphite pencils are

• advertising specialty pencils for custom imprint purposes (hexagonal and round shapes)
• golf pencils (hexagonal and round)
• designer theme pencils (includes licensed character/sports pencils, holiday themes, and other decorative themes ( generally round)
• artist quality graphite drawing and sketching pencils
• standard branded writing pencils (mostly all hexagonal shaped painted a single color)

See http://timberlines.blogspot.com/2008/04/myth-of-yellow-pencil.html