-
15,000 BCE
Protographisms
First traces of man, such as spots, stripes, spots generated in stones in and cave walls. -
3000 BCE
hieroglyphs
They are drawings or images plus the use of key signs that transformed the reading into a riddle -
2500 BCE
Phonograms
transforms into signs that represent the first sounds -
1000 BCE
Alphabet
the Greeks learned about the Phoenician alphabet and adapted it by adding vowels, thus forming the new alphabet by 23 letters -
37
Heliograph
instrument for making telegraphic signals by means of the reflection of the sun's rays in a movable mirror -
Diaries
set of printed publications that differ according to their periodicity -
Telephone
device that receives and transmits long-distance communications and is connected to a telephone network -
Social networks
They are structures formed on the internet by their people or organizations that connect from the internet
