Android Cloud SDK & REST APIs To build apps for rendering & viewing images, HTML, PDF, Word, Excel, Email, Visio, Project & CAD file formats....Word: DOC, DOCX, DOCM, DOT, DOTX, DOTM Excel: XLS, XLSX, XLSM...XLTX, XLTM PowerPoint: PPT, PPTX, PPS, PPSX, PPSM, PPTM, POTX...