You know, every smartphone is a computer system.
Be it.
Microsoft Windows Phone
The foundation is also Windows CE & NT (.xap / .exe) on a DOS base.
Apple's iPhone iPad iOS
The foundation is also macOS X (.ipa / .dmg) on the Dawin base.
Android and Alphabet's OS goodies (Google)
The foundation is also Linux OS (.apk / .apx) on the GNU base.
RIM Research's BlackBerry In Motion / B Gen.,
The foundation is also Java SunMicrosystems (.jar / .bar) on the QNX base.
Nokia / Intel's MeeGo\ Harmarttan (Maemo / Moblin)
The foundation is Debian Linux (.deb / .rpm) on the GNU base as well. For every Linux family, the OS can share the OS Participation, which is to run a system with the same foundation at the same time and switch, such as Nokia N9, to both MeeGo (.deb) and Android (.apk) because it is a Linux computer on the GNU base.














































































