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Starting from the very early days, computers have changed a lot. Vacuum tubes were used in the computers instead of today's transistors. The computers were too bulky and hard to operate. Taking example of ENIAC, world's first general purpose electronic computer, was weighted more than 27 tons. It used more than 17,000 vacuum tubes and more than 7,000 crystal diodes. It used 70,000 resistors, 10,000 capacitors and 1,500 relays. It had around 5 million hand soldered joints. It was roughly 8x3x100 feet in size and consumed 150 kW of power.

But today's computers are more small in size and consume less power. The phenomenon of portable computing is getting very popular now a days. Companies are launching many new portable computers which are small in size, light in weight and have very exciting designs too. Mini Laptops and tablet computers have become very popular because of their exciting design and portability of use.

Talking about future computers, companies are making many unique and purposeful designs. They are making computers smaller and smaller but yet very powerful device. The companies are making computers stylish in such a way that the computers have become a fashion now a day.

Lenovo pocket yoga is a very stylish looking netbook. It looks like as if it is specially designed to fit in the pocket. You can flip its display in such a way that you can use it as a tablet with its touch sensible display. The keyboard is specially designed for ease of use for the users. It's another new feature is its belt which can be turned into a mouse.

Hewlett Packard(HP) has also introduced its new concept designs. These designs are very special purpose designs. One of them is HP Eco. HP eco is designed for echo issued persons. It contains a barcode reader and solar charge cells. It also contains a special purpose bracelet which can measure blood pressure and pulse rate of the user. Another design of HP is HP Make-Up. As its name suggests it is specially designed for women. It can work as a make-up box for woman. It has a display which can turn into a mirror by pressing one button. It has a nail printing device too! Women can polish her nails with any color any time. It contains brushes too. Third design for HP is HP Mama. It is specially designed for parents to monitor their child. Parents can monitor their child's activity from a remote place with the help of two Bluetooth cameras. HP Perfume is also a model which you can change into a lamp or air freshener. It has ability to download smell samples too. With the help of HP fitness you can control your weight. It also contains a bracelet which keeps record of your workout sessions. You can measure your weight with the help of HP Fitness.