Yes! indeed they did.
The Indus Valley Civilization demonstrates as a place where human settlements organized into cities, did invent a system of writing and supported an advanced culture.
SUMERIANS!
Indus valley towns had running water and sewage systems. The world's oldest port is found at Lothal, an Indus Valley city on the coast. The world's oldest agricultural field is found in an Indus Valley site. The Indus valley people had their own writing system, and pictures of this may be seen at 'Indus Script Dictionary' on Facebook.
Egyptians
A writing systum, the calander, number systum...ect.
they invented paprus ,black ink,a writing system, and beer
develop a writing system
Because scientists cannot understand the writing of the people of the Indus Valley, they are unsure about how these people used to live.
Chinese writing was more complex and people could actually figure out the language,while people could
Complex irrigation networks have watered the valley and supported farming for 7,000 years.
The Sumerian writing system started as Cuneiform, as times changed in Sumer, writing became more complex and advanced. People gained basic knowledge of basic writing and over time the writing become more complex.
There were three systems:Hieroglyphic (pictographs)Hieratic (used by priests)Demotic (used by common people)