The plasma environment of Venus, Mars, and Titan, an introduction.- Upstream of Venus and Mars.- Upstream of Saturn and Titan.- Recent results from Titan's ionosphere.- The induced magnetospheres of Mars, Venus, and Titan.- Ion energization and escape on Mars and Venus.- Exospheres and energetic neutral atoms.- Modeling of Venus, Mars, and Titan.- Ion acceleration and outflow from Mars and Venus, an overview.- Titan, an overview.