Zipped Palm Markup Language (.pmlz)
The PMLZ file extension stands for Zipped Palm Markup Language, developed by Palm Inc. It is a compressed archive containing one or more Palm Markup Language (PML) files, used to create eBooks in the Palm Database (PDB) format for Palm PDAs. With the decline in popularity of Palm devices, PMLZ files have become less common. Users can open PMLZ files using zip-decompression utilities like 7-Zip.