Palm operating system
Palm OS - an operating system for mobile devices such as PDAs and smartphones.
Feature of the Palm OS is that it has a multitasking kernel, which has been licensed by the company Kadak. However, the user single-tasking Palm OS, while still allowing the possibility of playing a background player, that is on the screen can display only a single application. In addition, under the terms of the license agreement, of Palm prohibited from disclosing to third-party software developers and gaming API to create background tasks at the kernel level.