1. The document outlines the history of mobile communication systems from 1958 to 2002, including early analog systems, the development of GSM and other digital standards, and the evolution of 3G technologies. 2. A key event was the standardization of GSM in 1991, which became the dominant global standard and is now used by over 70% of mobile operators worldwide. 3. Alongside developments in cellular networks, wireless LAN technologies also evolved in this period, including early HIPERLAN standards, the introduction of IEEE 802.11 in 1997, and improvements to throughput with 802.11b and 802.11g.

1. IT 802D Mobile Communications Debasis Das