The adoption of technologies such as mobile phones, email and business, has, pushed worker productivity 480 percent in 2012 since 1972, according to the Individual Productivity report by O2 Business and the Centre for Economic and Business Research (Cebr). Digital working is expected to boost growth another 22 percent by 2020, driven by rising technologies such as O2's 4G high speed mobile internet access, and tablet computers, which will allow office workers to stay connected and productive wherever they are.The technologies allow businesses to accomplish more in a shorter amount of time, leaving more time for reaching new customers and improving service levels. In 1980 a gigabyte of hard disk space cost GBP 120,000 in today's money. It now costs around around 5 pence. The mobile phone was introduced in 1985, and a long period of growth followed in the early 1990s, coinciding with the launch of key technologies and products, such as Microsoft Windows 3.0 (1990), dial up internet (1992), and Google search engine (1998). The report marks the launch of The O2 Business Show Live, a three day event held in London on 22-25 October. The event showcases the latest technology available to SMEs and includes a pop-up exhibit charting the evolution of the office since the 1950s. O2 will take the show on tour, arriving in Manchester on 12-13 November and in Edinburgh for a one-off event on 14 November.