At the start, with absolutely no technology whatsoever, pens were probably just an idea… but employed on simple items (rocks, sticks, etc.). The early humans probably scraped rocks onto other rocks, or sticks onto rocks, in an attempt to draw/write, or maybe even just for the fun of it. Cave paintings, a discovery just found recently, were paintings in caves (hence the name). Even though they seem simple to the average person, the sight of cave paintings is quite astounding.
Pens finally took on an actual shape in 3000 BC, as the ancient Egyptians used a special type of rush that was growing on the coastline. This special type of rush is known to us as “Juncus maritimus”, or sea rushes. These plants were used to develop writing on papyrus scrolls. These sea rushes were used to make thin reed bushes/reed pens. These sea rushes were very-much useful to scribes (people who write out documents), as they used reed pens to write their books.
A pen is a writing instrument used to apply ink to a surface, usually paper, for writing or drawing. Historically, reed pens, quill pens, and dip pens were used, with a nib dipped in ink. Ruling pens allow precise adjustment of line width, and still find a few specialized uses, but technical pens such as the Rapidograph are more commonly used.Modern types include many types of pens.