Writing 3
               Computer and smartphone tablets

A computer is a device that can be instructed to carry out an arbitrary set of arithmetic or logical operations automatically. The ability of computers to follow a sequence of operations, called a program, make computers very applicable to a wide range of tasks.  The Internet is run on computers and it connects millions of other computers.Difference between Tablet and Smartphone
Key difference: Tablets are a cross between smartphones and laptops, have a bigger screen than smartphones and provide a better multimedia experience. Smartphones are mobiles that have capabilities like mini handheld computers.The major difference between smartphones and tablets is their connectivity. All smartphone, nowadays, have Wi-Fi and 3G connectivity. This means that they are able to connect to the internet through a Wi-Fi signal, and are able to use the 3G networks to call, send SMS, as well as, send and download data. However, most tablets only have Wi-Fi connectivity. Some tablets do come with both Wi-Fi and 3G connectivity, but they tend to cost more.Of course you could make things easy and plump for both a shiny new smartphone and a tablet, but they don't come and cheap and for many of us we only realistically need one or the other.