Gurus got rid of all of their shares of small-cap data storage company Ampex.

FORBES

These analog magnetic tape machines led to the development of audio and video recording technologies after WWII by companies such as Ampex.

FORBES: Magnetic Tape Turns 60

In 1956, the American company Ampex produced a machine called the Quadraplex.

BBC: News | UK | Video nation: 20 years of taping

The only video recorders at the time were huge Ampex reel-to-reel machines used by television stations to rebroadcast live shows in later time zones.

ECONOMIST: The battle to succeed the DVD has only just begun

Gurus got rid of all of their shares of small-cap data storage company Ampex (nasdaq: AMPX - news - people ).

FORBES: Gurus Buy Biotech And Software, Sell Health Care