1. The intellective human capability to operate environmental as well as inner variables for thinking purposes.

Scientific approaches to human memory have varied.

• The classic approach would differentiate memory encoding, storing, and retrieval. However, memory encoding and decoding occur dependent on cognitive variables, which may change; live systems are dependent on inner feedback processes which prevent formation of isolated modules that a partite perspective would require.

• Later approaches focus on information type. Semantic memory being purported to contain facts regardless of context, episodic memory to relate information types, and autobiographic memory to store memories of individual life's events, all classifications require more concern with the importance of language: non-verbal, sensory memory has been estimated to last about 0.5 second.

2. The human capability to record and store information about group or community developments.