Compound MOS capacitors and phase-locked loop with the compound MOS capacitors are disclosed. A core lexicon comprises commonly used words in a language; an extended lexicon comprises words not included in the core lexicon. The surfaces of the substrates are maintained in a horizontal position during processing. The voicemail system recognizes the incoming call as the owner of the voicemail system and presents a plurality of options for accessing the voicemail system without playing the outgoing message.