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After the war, electron tubes were used to develop the first computers, but they were impractical because of the sizes of the electronic components. In 1947, the transistor was invented by a team of engineers from Bell Laboratories. John Bardeen, Walter Brattain, and William Shockley received a Nobel prize for their creation, but few could envision how quickly and dramatically the transistor would change the world. The transistor functions like the vacuum tube, but it is tiny by comparison, weighs less, consumes less power, is much more reliable, and is cheaper to manufacture with its combination of metal contacts and semiconductor materials. Development of the television as an electronic device benefitted from many improvements made to radar during World War II. Radar was the product of studies by a number of scientists in Britain of the reflection of radio waves.
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Torch (534) Laser Lamp (50) Calculator (189) Radio (234) Electronic Gift (99) Flashing Electronic Gift (63) Promotional Fan (78) Digital Gift (57) Calendar (90) Sound Box (18) Theftproof Gear (13)

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Colorful Milk Cup Lamp
ID: hp-23443
mini music bar
ID: HP-026278
Solar Pedometer
ID: HP-026266
Outdoor LED headlamp
ID: HP-026268
Mind pedometer
ID: HP-026267
Pedometer
ID: HP-026257
Music Box
ID: HP-024650
The solar energy doll suspends
ID: HP-024167
The solar energy doll suspends
ID: HP-024168
The solar energy doll suspends
ID: HP-024169
The solar energy doll suspends
ID: HP-024170
The solar energy doll suspends
ID: HP-024171
The solar energy doll suspends
ID: HP-024172
The solar energy doll suspends
ID: HP-024173
The solar energy doll suspends
ID: HP-024174
The solar energy doll suspends
ID: HP-024175
The solar energy doll suspends
ID: HP-024176
The solar energy doll suspends
ID: HP-024177
The solar energy doll suspends
ID: HP-024178
Projection Clock
ID: HP-023956

home prev [1][2][3][4][5]next end[ Totals 99 gifts,and 5 pages ]

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