Applications designed to interact with which subsystem were the most common type of application in use with earlier operating systems, such as windows xp?

In a cellular network each cell is controlled by a tower what are these towers called?

Can someone work out the answer as it comes up in one of my computer science exams and i don't understand the cryptovariables

Which of the following types of software is most applicable to the promotion of new products through advertising? a.databases b. spreadsheets c. web design programs d. word processing tools