Today there are many things in our world which helps in full filling our needs. Many persons created many things to complete human needs by which he can do all his work and can get all the knowledge about every thing in this world. So here are some inventors who invented the things and helps us in doing all the things which were impossible. So get ready for knowing the needs which today helps us in our daily life which we all use and are not aware of those needs.
They are:- telephone; computers; telivision; automobile; cotton gin; camera; steam engine; sewing machine; light bulb; penicillin and manymore…………………. Some of them are
1.The Telephone- The telephone is an instrument that converts voice and sound signals into electrical impulses for transmission by wire to a different location, where another telephone receives the electrical impulses and turns them back into recognizable sounds. In 1875, Alexander Graham Bell built the first telephone that transmitted electrically the human voice.But today in 21st century another device has been invented called mobile phones which is easily to carrry in pockets and can be used any where.