Electronics technology has transformed the way we live, but as consumers expect ever more from their devices at faster speeds. An electronic device like personal computers as well as larger computing systems can overheat. This can cause them to slow down, or worse, completely shut down. The author is reported in this book that liquids containing nanoparticles could help devices stay cool and keep them running. In this book point out that consumers demand a lot out of their gadgets. But that puts a huge strain on the tiny parts that whir away inside desktops and mainframe computers, which do the major data crunching for us. The result is overheating. In this book has shown that substances called nanofluids have the potential to help keep electronics cool. Nanofluids are made of metallic nanoparticles that have been added to a liquid. The alumina-water nanofluid prepared and passes through the rectangular shape minichannel heat sink (consider as an electronic device). The contents of this book include preparation, characterization, and investigation of thermophysical properties, energy, exergy and entropy generation analyses of alumina-water nanofluid for cooling of electronics.