Pencils are marked on the basis of a European system called ‘the degree scale’, wherein a HB pencil has a medium range lead and the F pencil has a fine point, which is harder than a HB pencil.

An ‘author’ is the one who writes a content, which are developed on his own, whereas a ‘coauthor’ is the one who accompanies with some other author to write the content.

An ‘author’ is the one who originally creates his own content, whereas an ‘editor’ is the one who edits them.

In literary and creative writings, an ‘author’ is the one who originally creates his own content, whereas a ‘writer’ is the one who writes any sort of content, concerned to the relevant topics assigned to him...

The main difference between the HB and B pencil is that the HB pencil is a medium range lead, whereas B pencil has a softer lead.