Communication has evolved significantly over time, from early symbolic forms like cave paintings to modern digital technologies. Early humans developed speech around 200,000 years ago and began using symbols like pictograms around 10,000 BC to convey more complex concepts. Writing systems then emerged, beginning as early as the 4th millennium BC with clay tokens and progressing to alphabets by around 2000 BC. The need for more efficient long-distance communication drove technological advances like the telegraph in the 18th century, telephone in 1876, radio in the early 20th century, and the development of the internet in the late 20th century using protocols like TCP/IP. Communication continues to change with technological innovation and evolving human needs.