Usually people use the metric system, some (like people of the United States) use the English system.
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India itself uses the Indian place value system. However, countries that were once part of the Indian subcontinent, such as Pakistan, Nepal, Bangladesh, and Sri Lanka, also use the Indian place value system. Additionally, some Southeast Asian countries, including Indonesia, Malaysia, and Cambodia, adopted the Indian place value system through cultural interactions with India in the past.
Mayan
Yes and the positional place values of the numerals are self evident that's why a zero symbol was not needed for positional place value purposes which is essential in the Hindu-Arabic numeral system.
what is a system in which people make, exchange, and use thing that have value
The Romans didnt use the place value system
People knew and were confident that the items being exchanged would hold/keep their value as time went on. They did not use money because they were not sure that it would hold its value, and thats why the barter system was used by backcountry people.
Barter is a trading system where people trade goods or services that they think are around the same value.
Yes it increase the value of your home because home which is associated with automated system involves various things like security cameras,environmental control,user friendly systems, etc. which helps in maintaining the resale value of your home. But you need to be aware of it like it should be installed properly, the system has to be easy to use and the system has to be well documented.
Sonar
people use light for many things
i think the answer to which empire developed the number system we use today was the perisan empire because they developed so many things not that many thing and you know what i mean
people use computers for negative things like... stocking and haters because they either have No life or they just want to hurt people/ hurt peoples feelings that's why people use computers for negative things and I think its it wrong for people to do things like that.
Ergonomics is not a system of measurements. It is a study of designing and arranging things so that people can use them easily and safely.
You can use them to pay people or get things for yourself.
In barter economy, commodities were exchanged in the market. It was before the evolution of currency system that barter economy existed. Even today, in remote rural areas of India, the barter system still exists.