I want to describe before computer age.

An invention before computer age is Air Conditioner.It has made our life a lot more comfortable.

We can work long hours in summer siting inside an air conditioned room.

There are several advantages of air contions.It made possible for us to live in an hot and humid environment without getting tired.In addition,we can work long hours.

please upvote,follow me and resteem:
@sampadhali

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