prof comm

in the form of spoken or written words

in the form of gestures, eye contact or tone of a voice

ability to express thoughts and feelings

something that represent or stand for something else

painted on cave wall that told stories of battle

removing part of a rock surface by incising,pecking

pictures that represent an object or an idea

character that symbolies the idea of a thing

a sequence of letter, word, or symbol

a set of letter or symbols in fixed order

Johann Gutenburg invented an actual printing press in 1450

in 1714 an englishman, henry mill, received the first patent for typewriter

1831 joseph henry invents the electric telegraph

Alexander graham bell invented the telephone in boston in 1876

the computer was manufactured in the u.s.

in 1973a global computer network emergedx, providing a variety of information and communication favilities