1. The document discusses different forms of communication including verbal (oral and written) and non-verbal (sign language and body language) communication.
2. Within verbal communication, the document compares the merits and demerits of oral communication versus written communication. Oral communication saves time and money but has greater chances of misunderstanding, while written communication provides a permanent record but is more costly and time-consuming.
3. The document also discusses face-to-face communication and notes that while it allows for facial expressions and gestures, it is difficult for large groups and relies on listener attentiveness. Silence and functions of silence in communication are briefly outlined as well.