By and large, Communication (from Latin commūnicāre, meaning "to share") is a purposeful activity of exchanging information and meaning across space and time using various technical or natural means, whichever is available or preferred.Communication requires a sender, a message, a medium and a recipient, although the receiver does not have to be present or aware of the sender's intent to communicate at the time of communication; thus communication can occur across vast distances in time and space. Communication requires that the communicating parties share an area of communicative commonality. The communication process is complete once the receiver understands the sender's message.[citation needed]Discursive communication three primary steps:There are a range of verbal and non-verbal forms of communication. These include body language, eye contact, sign language, haptic communication, and chronemics. Other examples are media content such as pictures, graphics, sound, and writing. The Convention on the Rights of Persons with Disabilities also defines the communication to include the display of text, Braille, tactile communication, large print, accessible multimedia, as well as written and plain language, human-reader, augmentative and alternative modes, means and formats of communication, including accessible information and communication technology. Feedback is a critical component of effective communication.