Circulars are most commonly used for advertising and making public statements. These can come in the form of posters, leaflets or handouts that make people aware of a particular subject. The audience for a circular can be as widespread as you wish depending on how many people you wish to make contact with.
notice is sticked to a particular place whereas circular is meant for all and it should be circulated.
diffrince between notification and circular
both are forms of business communication but a memo is meant for 1 person or 1 group and a notice is for the staff in general. So a memo is addressed as to "you" and a notice as to "the staff"
what is difference between communication and transport
difference between ip address and class