A 2010 OCLC report found that an internet-accessible finding aid existed for only 44 percent of archival collections. Undescribed collections are essentially hidden from users, and much of the blame can be assigned to the strain of processing backlogs. Extensible processing offers an alternative, allowing collection managers to first establish a baseline level of access to all holdings, then conduct additional processing based on user demand and ongoing assessment. Adhering to archival principles and standards, this flexible approach emphasizes decision-making and prioritization.