The directories were compiled by using official websites, search engines and hundreds of phone calls verifying the location(s) and/or existence of each county's corrections division and CJIS. Maintenance and accuracy checks are a matter of using the site like everyone else; making sure searches and the data with it aren't misleading. This area on most pages will connect you to the others by well marked links. Related services will be here also; Felon jobs, prison pen pals and inmate programs.
Unique terms based on geographic regions will be explained here on individual state pages. Whether it's tradition or incidental, notable differences between agencies or how they are referred to is usually based on what the locals like to call it. Anywhere they can lock up criminals, there's going to be an inmate search.