A compuer can come in many shapes in forms. Your car is a computer. Your cellphone. Even your microwave. So, in my opinion, the most common computer is a cellphone. (With China and the EU alone nearly topping out at 1 billion.)
Source: http://www.infoplease.com/ipa/A0933605.html
The most common computer protocols are TCP, FTP, and System32.
Microsoft
The user is the most common problem and most common cause of other problems.
The most common Serial porty is the DB port also know as D-sub or D-subminiature port. USB is not serial port.
No. The most common family is a mother and her children.
The most common currency traded today is the US Dollar with almost 85% of the trading volume.
Zeros
Desktop computers is the common type of computer. Or we can say calculator is the type of computer
handgun
Obesity
Human
Ears