Pen

A pen is a handheld instrument used for writing and drawing. The common type transfers ink (a colored fluid) onto the surface of paper or other material. The Somali word 'qalin' is also sometimes used more broadly for writing instruments in general, including the pencil, which uses graphite rather than ink.

A pen consists of a body (shaft) that holds the ink and a nib (point or ball) that delivers the ink. When the nib is moved across paper, the ink flows under pressure and friction from the point or ball, leaving a mark on the paper's surface.

Brief History

Before the modern pen, people used instruments made from reeds and bird feathers with ink applied to them. Later, metal pens with nibs were invented and filled with ink. In the twentieth century, the ballpoint pen was developed, with ink that flows smoothly and does not dry out easily, making it the most widely used writing instrument in the world.

Types

Major types include the fountain pen with a metal nib, the ballpoint pen using liquid (oil-based) ink, the gel pen with thick ink that flows smoothly, and the marker with a broad porous tip for writing on large surfaces. There are also styluses for touchscreens, which do not use ink.

Use and Social Significance

The pen is an essential tool for education, administration, and business. The signing of legal documents typically requires a pen with permanent ink that does not fade easily. In primary education, pen use is connected to the development of fine motor skills and letter recognition.