the evolution of portable audio devices

Transistor Radio

Nov 1, 1954

"Needed one or more non rechargable "so-called "A" batteries just to heat the tube filaments and a large 45- to 90-volt "B" battery to power the signal circuits."

Walkman

Jul 1, 1970

is a Sony brand tradename originally used for portable audio cassette players

Diskman

Mar 15, 1984

was the product name given to Sony's first portable CD player, the D-5 which was the first on the market in 1984.

IPOD CLASSIC

Oct 23, 2001

The first Ipod was relesed
with the ipod Classic...
It had 5 to 10 gigs of space
This has got 6 versions known as generations

Ipod Mini

Jun 6, 2004

The ipod Mini was relesed and holds only 4gb
Their have been Many generations and was discontinued in September 7, 2005.

Ipod Shuffle

Jun 11, 2005

Apple Relesed the Ipod Shuffle in 11 Janurary 2005 this had no screen and could only hold up to 1 gb of space.

iPod Nano

Sep 7, 2005

is a portable media player designed and marketed by Apple Inc.

Ipod Touch

Sep 5, 2007

The ipod Touch first Gen was Relesed with Internet and A touch Screen.