| filename extensions | art-335 |
| ho | |
| TechTarget file types | art-336 | HO-Knowledge-Explorer-Knowledge-Representation-Hierarchy-Outline |
| TechTarget file types | art-336 | HO-Unknown-Apple-II-File |
| English | eng-000 | Knowledge Explorer Knowledge Representation Hierarchy Outline |
| English | eng-000 | Unknown Apple II File |