Pile of Indexcards

Division of an indexcard and fieldnote can be easily understood through a metaphor on computer.

brain = CPU / Fieldnote = Virtual Memory (HDD) / indexcards+Dock = HDD

Main use of the fieldnote in the PoI system is temporal idea capturer. Almost all topics on the fieldnote will be copied to indexcard and stored in the dock later. Simple to-dos, buying toilet paper for example, are processed on fieldnote without copying to indexcard.

The fieldnote reduce an effort to remember/remind stuffs. It helps to increase one's brain usage as Central Processing Unit (CPU). Our brain could work as vaporous, if we have reliable virtual memory and HDD behind.