A barrister bookcase

is a traditional bookcase that is believed to have originated in Britain and had connections with a lawyer by the name Barrister. Its distinguishing feature is a clear glass front. This glass front is hinged at the top allowing a person to easily access books and other collectibles simply by lifting the glass door that have knobs installed on them. The barrister bookcase is ideal for just about anything.  Barrister bookcases were frequently used by lawyers since it was necessary for them to keep on moving. Today, they are also very handy, especially if one is always on the move. This is because the bookcase is closed by use of doors. This enables books and collectibles to be moved while still inside the bookcase while still retaining them.

Source: http://www.barristerbookcases.info/