1 and. Android_secure is an official app2sd product, and the software installed in the sd card cannot be used after being deleted.

2. Bluetooth As the name implies, you will have this with Bluetooth.

3.mobo, as the name implies, is the cache file of Moboplayer.

4.QQ, as its name implies, is the cache file of QQ.

5,.quickoffice As the name implies, quickoffice's cache file.

Extended data:

System structure:

Android runs on the Linux kernel, but it is not GNU/Linux. Because most functions supported by GNU/Linux are not supported by Android, including Cairo, X 1 1, Alsa, FFmpeg, GTK, Pango and Glibc, etc., they have been deleted.

Android uses Bionic instead of Glibc, Cairo uses Skia, and FFmpeg uses opencore.

In order to realize commercial application, Android must remove the part of GNU GPL license restriction. For example, Android moves the driver to user space and completely separates the Linux driver from the Linux kernel.