1 / 6Bharat Ratna Dr. Today is the birthday of Sir Mokshagundam Visvesvaraya. Today is celebrated as 'Engineer's Day'. Born in 1861, Visvesvaraya lived to be 101 years old. He died on 14 April 1962 in Bangalore. Field of engineering2 / 6Patricia Bath was the first African American woman doctor to receive a medical patent. She developed state-of-the-art technology to treat cataracts. She was the first African American to complete her studies in ophthalmology. (Image Credit- esilv.fr)3 / 6Heidi Lamar was an incredible actress and a brilliant female inventor. She devised a method of encrypting signals so that enemy spies would not hear sensitive parts of the information. For a long time, no one took her seriously in engineering. 4 / 6Ada Loveless is the first person to recognize the potential of an analytical engine for a device like a computer. Born in the 19th century, the mathematician was originally known as a computer programmer 100 years before the invention of the computer.5 / 6Marissa Mayer is currently one of the most powerful business women in the world. She is one of the most famous women in science and engineering in the contemporary world. First female engineer to join Google and first female CEO of Yarchu Fortune 5006 / 6Edith Clark is the first female engineer. Born in 1883, Edith invented the Clark calculator for graphing electrical properties. She used the legacy she inherited from her parents to study mathematics in college.