LAS-LAZ
From Just Solve the File Format Problem
LAS is a file format for exchanging 3D point cloud data from Lidar captures[1]. The LASer format standard was developed by the American Society for Photogrammetry and Remote Sensing (ASPRS)[2].
File Information
LAS files have a magic header of 4 bytes LASF
[3]
LAZ files are compressed versions of the LAS format[4].