Space technology and space applications have grown tremendously in the last three decades concurrently with the growth of electronics engineering as a discipline and electronics as an industry. The electronic components, subassemblies, assemblies, subsystems and systems used for realising the space electronics are designed, developed, fabricated and manufactured using multidisciplinary and interdisciplinary approach. This approach which requires attention to all the required details is responsible for realising very low failure rates and very high reliability. An overview of this approach is presented here to facilitate understanding of space electronics.