Communications software functions as a way to establish contact, whether it's with colleagues or clients. The term "communications software" can be utilized synonymously with terms like collaboration software, messaging software or even business software. Collaboration software encompasses different types of programs than communications software and can indicate applications that promote teamwork or sharing information, such as project management software. Likewise, messaging software refers to dozens of applications that enable communication through text and email. Business software, on the other hand, is a more extensive category that may include billing software, accounting software, and other programs that help businesses operate more efficiently.