- Orbit Reader 20 User Guide v2.9 (DOC) – Manual in Doc Format
- Orbit Reader 20 User Guide v2.9 (PDF) – Manual in PDF Format
- Orbit Reader 20 User Guide v2.9 (HTML) – Manual in HTML Format
- Orbit Reader 20 User Guide v2.9 (BRF Grade 1) – Manual in BRF ENG Grade 1 Format
- Orbit Reader 20 User-Guide v2.9 (BRF Grade 2) – Manual in BRF ENG Grade 2 Format