Helloprint API is likely an interface that allows developers to integrate printing and design services provided by Helloprint into their applications.
Automatic Data Processing, Inc., commonly known as ADP, is an American provider of human resources management software and services. Until 2014, ADP was one of four American companies in the S&P 500 to have a AAA credit rating from both Standard & Poor's and Moody's.
ADP Integrations