In \"The Last Question\", Asimov delves into the idea of a supercomputer named Multivac that evolves over time and eventually contemplates the ultimate fate of the universe.

In \"Fahrenheit 451\", books are forbidden and burned by firemen. The temperature 451 degrees Fahrenheit is the temperature at which books ignite and burn.

In \"2001: A Space Odyssey\", Clarke introduces HAL 9000, a sentient computer that becomes a central character in the story and raises questions about artificial intelligence.

In \"The Ones Who Walk Away from Omelas\", Le Guin presents a thought-provoking scenario where the happiness and prosperity of the city of Omelas depend on the suffering of a single child.

In \"The Time Machine\", Wells introduces the concept of a time machine that allows the protagonist to travel through time and witness different eras of human history.

In \"Brave New World\", soma is a drug that is used to maintain social stability and control by suppressing negative emotions and promoting happiness.

In \"Do Androids Dream of Electric Sheep?\", Dick delves into the idea of alternate realities and explores the question of what it means to be human in a world where artificial beings are indistinguishable from humans.

In \"Harrison Bergeron\", the Handicapper General is responsible for enforcing a system of handicaps that aims to suppress individuality and promote conformity among all citizens.

In \"Solaris\", Lem introduces Solaris, a sentient ocean that communicates with humans and raises questions about the nature of consciousness and communication.

In \"Oryx and Crake\", the Crakers are a genetically engineered species of humans created by the protagonist, Crake, as a potential replacement for humanity.

In \"The Garden of Forking Paths\", Borges presents a labyrinthine narrative structure that reflects the complex and interconnected nature of time and reality.

In \"Rendezvous with Rama\", Rama is an alien spacecraft that arrives in the solar system and contains a message from an advanced alien civilization.

In \"Nightfall\", Asimov introduces a supercomputer named Multivac that is capable of predicting the future and helps humanity prepare for an impending cosmic event.

In \"The Veldt\", the nursery is a room that is equipped with advanced technology and can create realistic simulations of any environment, allowing the children to experience different worlds.

In \"The Fountains of Paradise\", Clarke introduces the concept of a space elevator, a structure that allows humans to travel into space using a cable anchored to the Earth's surface.