TRAIL Metrics

TRAIL statistics are updated every six months, generally in January and July.  Some statistics reported below are for the most recent six months, while others are cumulative.

The statistics below are current as of January 19, 2021.

Cumulative Statistics

Number of TRAIL records in the HathiTrust Digital Library  58,528
Number of TRAIL records in the University of North Texas Digital Library  28,863
Total number of TRAIL records  87,391

 

Statistics for the most recent six-month period (July - December 2020)

Number of technical reports processed for digitization  No shipments during this period, due to COVID-19
Usage of TRAIL content held at the University of North Texas  237,246
Number of TRAIL search interface sessions  2,282
Number of TRAIL search interface users  1,899

 

Current Statistics (as of January 20, 2021)

Number of TRAIL institutional members  51
Number of TRAIL personal members  12

 

Definitions

Number of reports processed for digitization

The number of reports for which the University of Arizona has created catalog/metadata records prior to those reports being digitized and eventually made publicly available. Metric recorded upon shipment for digitization.

 

Usage of UNT-located TRAIL content

The number of uses of the TRAIL reports stored in the University of North Texas (UNT) Digital Library.  It is not yet technically possible to provide similar usage statistics for the TRAIL content stored in the HathiTrust Digital Library, TRAIL’s other digitization/preservation partner.

 

Number of TRAIL search interface sessions

The number of times individual IP/browser combinations accessed the TRAIL search interface for up to 30 minutes.

 

Number of TRAIL search interface users

The number of individual IP/browser combinations that access the TRAIL search interface.

TRAIL - Technical Report Archive and Image Library - logo

Search U.S. government technical reports issued primarily prior to 1976 and digitized by TRAIL.