Abstract: A printing method using a multiple pages per side (Nup) function, and a computer readable recording medium storing a computer program to execute the printing method, includes processing and printing only data of a page set to be multiple printed as data to be multiple printed; or processing and printing data of a page to be printed according to N set for a group to which the page required to be printed belongs; or generating a number indicating the quantity of the multiple pages to be printed on a physical page according to a set printing environment and multiple-printing the plurality of pages together with corresponding page numbers according to the printing environment according to the processed data and the generated number of multiple pages; or reducing identical contents and copying the reduced contents by a predetermined number of times, and printing the copied result on a sheet of paper, in response to a user selecting a repetition printing function; or performing a multiple-printing operation using a

Abstract: An apparatus for protecting a specific number in a facsimile system includes an operating panel having a protection key for activating a protection function, and a plurality of keys for enabling input of the specific number. A display unit displays a message indicating that the protection key has been input in response to the input of the protection key from the operating panel. A memory stores the specific number. A central processing unit deletes the specific number from the memory to perform the protection function in response to the input of the protection key. A printer prints a list from the memory to confirm whether performance of the protection function is completed.