A delivery system comprising: a plurality of terminals; and a delivery managing device to which the plurality of terminals are connected through a network, the delivery managing device comprising: a creating unit configured to create display information based on operation information indicating an operation input accepted by a terminal of the plurality of terminals; a converting unit configured to convert the display information into video information; and a delivery unit configured to deliver the video information to each terminal of the plurality of terminals, each of the plurality of terminals comprising: an operating unit configured to receive operation information; a transceiving unit configured to transmit the operation information to the delivery managing device and to receive the video information; a display control unit configured to display drawing information on a display unit based on the operation information; and a rendering unit configured to display the video information on the display unit, characterized in that when the operating unit of a first terminal of the plurality of terminals receives non-public operation information not to be published to a second terminal of the plurality of terminals, the first terminal is configured to hold the non-public operation information; and when operation for publication of the non-public operation information is made thereafter, the transceiving unit of the first terminal is configured to transmit the held non-public operation information to the delivery managing device as operation information. a plurality of terminals; and a delivery managing device to which the plurality of terminals are connected through a network, the delivery managing device comprising: a creating unit configured to create display information based on operation information indicating an operation input accepted by a terminal of the plurality of terminals; a converting unit configured to convert the display information into video information; and a delivery unit configured to deliver the video information to each terminal of the plurality of terminals, each of the plurality of terminals comprising: an operating unit configured to receive operation information; a transceiving unit configured to transmit the operation information to the delivery managing device and to receive the video information; a display control unit configured to display drawing information on a display unit based on the operation information; and a rendering unit configured to display the video information on the display unit, a creating unit configured to create display information based on operation information indicating an operation input accepted by a terminal of the plurality of terminals; a converting unit configured to convert the display information into video information; and a delivery unit configured to deliver the video information to each terminal of the plurality of terminals, each of the plurality of terminals comprising: an operating unit configured to receive operation information; a transceiving unit configured to transmit the operation information to the delivery managing device and to receive the video information; a display control unit configured to display drawing information on a display unit based on the operation information; and a rendering unit configured to display the video information on the display unit, an operating unit configured to receive operation information; a transceiving unit configured to transmit the operation information to the delivery managing device and to receive the video information; a display control unit configured to display drawing information on a display unit based on the operation information; and a rendering unit configured to display the video information on the display unit, characterized in that when the operating unit of a first terminal of the plurality of terminals receives non-public operation information not to be published to a second terminal of the plurality of terminals, the first terminal is configured to hold the non-public operation information; and when operation for publication of the non-public operation information is made thereafter, the transceiving unit of the first terminal is configured to transmit the held non-public operation information to the delivery managing device as operation information.