SIM card produced for Telecom Australia and MobileNet Digital bearing the Memorandum of Understanding (MoU) logo, Australia, 1994.

GSM stands for Global System for Mobile Communications (originally Groups Spécial Mobile), which was a European standard for early mobile networks, meaning that subscribers could use their phones across the whole of Europe. A key feature of GSM was the Subscriber Identity Module, commonly known as a SIM card. This is an early Australian SIM card, and shows how the standards spread across the globe. It includes the logo of the 'Memorandum of Understanding', the document that was signed at the beginning of the process to agree and create the GSM standard.