Palm OS - A competing operation system to windows mobile is palm os, which runs on smart phones and pda. With palm OS devices, users manage schedules and contacts, phone message, notes, task and address list and appointments. Informations on the mobile device easily synchronizes with a personal computer or prints on a printer using a cable or a wireless technology.

Many palm  OS devices allow users to connect wirelessly to the internet, browse the internet, send and receive e-mail massages and instant message, listen music, record voice massages and view digital photos. Most have touch screens. The latest version of palm OS allows for biometric identification and support the use of smart card.