amateurs'manuals applecomputer applicationsoftware cellphones computer-assistedinstruction computerdrawing computergraphics computerliteracy computeroperatingsystems computersandolderpeople computersoftware computertechnology desarrollo design development digitalmusicplayers digitaltechniques education educationaltechnology effectoftechnologicalinnovationson electronicbooks electronicpublications etc handbooks html(documentmarkuplanguage) imageprocessing informatique internetandolderpeople internetprogramming internettelephony ios(electronicresource) iphone(smartphone) ipodtouch(digitalmusicplayer) javascript(computerprogramlanguage) macintosh(computer) macos macos(computersoftware) manuals mobilecomputing nonfiction onlineetiquette operatingsystems(computers) painting photography pocketcomputers portablecomputers portablemediaplayers programming smartphones softwaredeaplicacion studyandteaching tabletcomputers technologyandolderpeople websitedevelopment websites wordprocessing