"Application service provider" (ASP) is remote software that an office can access through a web browser. The Denticon program is an ASP program.
Instead of installing megabytes of software on the office's local computer hard-drive, users simply rent the use of the ASP software that exists elsewhere on the Internet. The office never actually owns the ASP software; rather, it is utilized for a nominal fee.
ASPs are also known as "Software as a Service" (SaaS).