Information Systems Division (ISD) is a private business that has an annual budget in excess of $350 million, with 1160 staff. ISD supplies information and communication infrastructure, networks and systems to the Australian Department of Defence

The complete dish, Paula Wilkes, Defence Magazine, February 2005

“Information Systems Division (ISD) is also making good use of satellite communications on the Optus C1 satellite. The Defence-owned transponders on this satellite, which are directly managed by ISD, support the ADF located in the Solomon Islands and East Timor, and Navy ships at sea.”