The opposite would be "to open up a program." This time, I got an error
message while working on my spreadsheet program. A "spreadsheet program"
is a type of computer program that lets you enter numbers and perform
calculations, such as adding, subtracting, and other math formulas. Spreadsheet
programs often are used to calculate, or figure, out how much a company is
making, for example. The most popular program currently in the U.S. is
Microsoft Excel; that's the most popular spreadsheet program.