Android's Processes

I need to know some information about all android's basic processes, such as

• com.android.phone

• android.process.acore

• com.android.mms

• com.android.alarmclock

• com.android.calendar

• android.process.media

• com.android.voicedialer

• android.process.im

unfortunat开发者_开发问答ely, i could not find any good information on the internet

Thanks for your cooperation.