What is the difference between a 13 column abacus and 5 column abacus?

The narrative structure of the popular movies can be broken down into

The study of how to design software, solve problems such as computer security threats, or come up with better ways of handling data storage

Match the categories in the first column with examples in the second column. 1. good for watching movies 2. maximum power with small size 3. older style mobile devices that may or may not have internet connectivity tablet computer a.)pda b.)smart phone c.)tablet computer