Palm OS sī 1 khoán tiàm kò-jîn sò·-ūi chō·-lí (PDA) téng-koân pháng ê chok-gia̍p hē-thóng (OS). Hiān-chhú-sî sī PalmSource kong-si teh khai-hoat, pun 2 chióng pán-pún, Palm OS Garnet (5.x) kap Palm OS Cobalt (6.x). PalmSource àn-sǹg PalmOS Cobalt hām Linux kernel kiat-ha̍p.

Thâu-khí-seng sī US Robotics khai-si khai-hoat Palm OS. Āu--lâi pìⁿ Palm, Inc.. Palm, Inc. thiah-chò PalmSource (nńg-thé) kap palmOne (ngē-thé) liáu-āu tō tī PalmSource ê miâ-gī hā khai-hoat. Tī 2005 nî PalmSource khì hō· Ji̍t-pún kong-si Access bé--khì.