ADCTest was created in 2017 by AVP (www.weareavp.com), and developed by Christian Landone, for the Library of Congress and the other federal government agencies participating in the Federal Agencies Digital Guidelines Initiative.
A user guide for this product is available here: https://bit.ly/ADCTest-User-Guide.
More information can be found on the FADGI website here: http://www.digitizationguidelines.gov/guidelines/digitize-ADCTest.html.