2771 Graphisoft Archicad Project 17+ Aggregate Archicad is a proprietary architectural and Building Information Modelling (BIM) software application produced by Graphisoft. Files with the .pln extension are the standard working format, whereas files with the .pla extension are the Archicad archive file type, that bundles together all components, linked images and textures into a single package. This signature does not currently distinguish between specific Archicad format types. 244 Preservica / Preservica 25 Aug 2023 25 Aug 2023 fmt/1913 PUID pln File extension pla File extension 2263 Archicad Project BOF; Offset: 0; Magic Bytes: ‘ROF FDB ’ 1 Absolute from BOF 0 0 524F462046444220