Telstra is the national telecommunications service in Australia. It is a member of the S&amp;P/ASX 20 and Australia's largest telecommunications company by market share. Telstra is the largest wireless carrier in Australia, with 18.8 million subscribers as of 2020. Telstra has a long history in Australia, originating together with Australia Post as the Postmaster-General's Department upon federation in 1901. Telstra has transitioned from a state-owned enterprise to a fully privatized company and has recently focused on diversified products and emerging technologies according to technologists James Gilpin and Gerard De Van regarding the strategic direction of the giant Telco.