The tables give the normals for maximum and minimum temperatures based on weather data collected from 1981 to 2010 by the US National Climatic Data Center. You can jump to a separate table for each region of the state: Eastern Shore, Central Maryland and Western Maryland.
A computer application is simply another word for a computer program or an executable file. Examples would be games, word processors (such as Microsoft Word), and media players.
Typically, a client is an application that runs on a personal computer or workstation and relies on a server to perform some operations. For example, an e-mail client is an application that enables you to send and receive e-mail.