| Adler32 | Adler32 Checksum |
| CryptoEngine | PDF encryption class |
| LZW | LZW Decompression class |
| NumFormatInfo | Number Format Information static class |
| OpCtrl | Operator control table |
| OutputCtrl | Output control class |
| PdfArray | PDF array object |
| PdfBase | PDF object base class |
| PdfBoolean | PDF boolean object |
| PdfByteArrayParser | byte array parser for graphics contents |
| PdfDictionary | PDF dictionary class |
| PdfFileParser | PDF file parser |
| PdfIndirectObject | Indirect object class |
| PdfInteger | PDF integer class |
| PdfKeyValue | Dictionary key and value class |
| PdfKeyword | PDF key word object |
| PdfName | PDF Name class |
| PdfNull | PDF null object class |
| PdfObject | PDF indirect object base class |
| PdfOp | PDF contents operator class |
| PdfParser | PDF base parser |
| PdfRawData | PDF raw string class (for encoding) |
| PdfReader | PDF Reader class |
| PdfReal | PDF real number class |
| PdfReference | PDF indirect object number |
| PdfString | PDF string class |
| Reports | Static report utilities |
| DecryptionStatus | Decryption status enumeration |
| EncryptionType | Encryption type enumeration |
| KeyWord | Enumeration of key words for PDF key word object |
| ObjectType | PDF indirect object type |
| Operator | Graphics page contents operators |
| Permission | PDF reader permission flags enumeration |