Stanislaw Lem was a Polish writer, best known for his science fiction works. He was born in 1921 and died in 2006. He wrote over 40 books, including the novel Solaris, which was adapted into a film in 1972. His works often explored philosophical themes, such as the nature of intelligence and the role of technology in society. He is considered one of the most important science fiction writers of the 20th century. The three-letter acronym LEM stands for his surname.