Originally Posted by
Rebelondeck
All p-types are input oriented while j-types have output as a priority. Note that priority is distinct from time spent on either input or output. Output oriented means that producing something is more important than gaining information whereas input oriented people pursue skill, information and preparedness more than actual products. Information steers p-types in an ad hoc fashion while concrete achievement and results or lack thereof drive j-type directions. This doesn't imply that p-typed cannot produce or j-types are not interested in information or skills; it refers simply to priorities.
a.k.a. I/O