Pencil are the most commonly used instrument for writing and none of the offices are complete without them. This simple instrument is made of Graphite, which was first discovered in England during mid 1500s.
The initial days of making a pencil was a bit crude and handmade, but now sophisticated technology and highly precise machines are powering pencil factories around the world. Here is an interesting video that takes you through the entire process of making a pencil at one such sophisticated factories
cc image credit:flickr/pinksherbet