-
Invention of the radio
In 1866 Mahlon Loomis provided the first demonstration of wireless communication -
first radio broadcast signal
then in 1895 Guglielmo Marconi sent the first radio signal. Radio developed from wireless telegraphy towards the end of the 19th century. -
radio helps discover north pole
n about 1910 radio operators were stunned to hear the voice of an arctic explorer stating that he had 'found the pole' coming through their headphones where previously there had only been morse code tones. -
first cassette tape
n 1963, Philips Electronics designed a new sound recording medium - the cassette tape -
invention of the walkman
"In 1979, an empire in personal portable entertainment was created with the ingenious foresight of Sony Founder -
First Digital Mp3
Apple Inc. hired Kramer as a consultant and presented his work as an example of prior art in the field of digital audio players. The world's first company to announce a portable MP3 player and the attendant system for uploading MP3 audio content to a personal computer and then downloading it onto a personal MP3 player was Audio Highw -
Mobile Mp3
In 2001 the first MP3 players were installed into mobile phones in South Korea and the first artist to sell songs as MP3 file downloads directly to mobile phones was Ricky Martin -
I-pod Classic
Apple introduced the first-generation iPod on October 23, 2001, with the slogan "1,000 songs in your pocket". -
I-pod ( Second generation )
The second generation iPod was introduced on July 17, 2002. Using the same body style as the first generation, the hold switch was redesigned, a cover was added to the FireWire port, and the mechanical wheel was replaced with a touch-sensitive wheel. -
I-pod ( Third generation )
On April 28, 2003, Apple announced a completely redesigned third-generation iPod. Thinner than the previous models, the third generation models replaced the FireWire port with a new Dock Connector (which is still used today) and introduced the Touch Wheel, a completely non-mechanical interface with the four auxiliary buttons located in a row between the screen and the touch wheel -
I-pod ( Fourth Generation )
Announced on July 19, 2004, the fourth-generation iPod replaced the touch wheel from the third generation iPod with the Click Wheel from the iPod Mini, putting the four auxiliary buttons underneath a touch-sensitive scroll wheel. The casing was also slightly slimmer. -
I-pod ( Fifth Generation )
The fifth generation iPod was introduced on October 12, 2005, shortly after the introduction of the iPod Nano. The fifth generation iPod featured a 2.5" 320x240 QVGA screen and a smaller Click Wheel. It is also known as the iPod Video, mainly because it is the first iPod to be able to play videos. -
I-pod ( Sixth Generation )
During a special iPod-centric event on September 5, 2007, Steve Jobs introduced the sixth generation iPod and the retronym suffix "Classic". Featuring slightly thinner bodies, the sixth generation Classic also sported dramatically improved battery life, claiming up to 36 hours of music playback and 6 hours of video playback -
I-pod touch
The product was launched on September 5, 2007, at an event called The Beat Goes On. The iPod Touch adds the multi-touch graphical user interface to the iPod line. It is the first iPod with wireless access to the iTunes Store, and also has access to Apple's App Store, enabling content to be purchased and downloaded directly on the device. Apple Inc. has sold over 32 million iPod Touch units as of the end of 2009. -
I-pod Touch ( Second Generation )
he second generation iPod Touch features external volume controls, a built-in speaker, a contoured back, built-in Nike+, Bluetooth support, and the ability to connect a microphone. It was unveiled on September 9, 2008, at the "Let's Rock" keynote presentation. -
I-pod Touch ( Third Generation )
The 3rd generation iPod Touch with iPhone OS 3.1 was announced and subsequently released on September 9, 2009. It is available with 32GB or 64GB of flash memory. he new 3rd generation iPod Touch includes faster hardware (the same microprocessors, graphics engine, and RAM as the iPhone 3GS), a slightly lower battery life, voice control, light sensor, and bundled earphones with a remote and microphone. -
I-pod Touch ( Fourth Generation )
Apple unveiled the 4th generation iPod Touch on September 1, 2010. It features Apple's Retina display and two cameras; one for FaceTime and the other for photos and HD video recording. It also contains Apple's A4 chip for faster processing, a microphone for communication and voice memos
