| rb | Rocket eBook |
| rzb | Red Zion Book |
| rzn | Red Zion Notes |
| sbrz | Sky Ebook Reader Encrypted Ebook |
| smbp | Mobipocket E-book Secured Auxiliary Data |
| snb | Shanda Bambook eBook |
| sva | Manga Browser Comic |
| tcr | TCR E-book |
| tebr | Tiny eBook Reader Ebook |
| tk3 | TK3 E-Book |
| tpz | Amazon Topaz E-book |
| tr | TomeRaider 2 E-book |
| tr3 | TomeRaider 3 E-book |
| txtz | ZIP Compressed Text Ebook |
| ubk | Embiid Reader eBook |
| updb | cBook Ebook |
| vbk | VitalBook eBook |
| webi | Web Book Internal Format eBook |
| webz | WEBZ Compressed eBook |
| wmga | Web Manga Document |
| wol | WOLF eBook |
| wolf | WOLF Document |
| xeb | Apabi eBook |
| xks | IBM Softcopy Reader PDF Extended Bookshelf File |
| ybhtm | yBook E-book HTML Document |
| ybk | Yanceyware eBook |
| ybrar | yBook E-book Archive |
| ybrtf | yBook E-book RTF Document |
| ybtxt | yBook E-book Text Document |
| yjf | Kindle v10 KFX Ebook Metadata |
