I need to know the answer please

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

Design a pos circuit that displays the letters a through j on a seven-segment indicator. the circuit has four inputs w, x, y, and z which represent the last 4 bits of the uppercase ascii code for the letter to be displayed. thus, if wxyz = 0001 then "a" will be displayed. (any answer with 22 or fewer gates and inverters, not counting any for the inputs, is acceptable)

What is the digital revolution and how did it change society? what are the benefits of digital media?