Agilent Technologies makes laboratory instruments, chemical analysis equipment and diagnostic tools used in pharmaceutical research, chemical analysis, environmental testing and clinical diagnostics. Its instruments, including chromatography and mass spectrometry systems, help scientists identify and measure chemical compounds in complex samples, technology essential to drug development, food safety testing and environmental monitoring. Much of Agilent's revenue comes from consumables and services tied to instruments already installed in customer labs, giving it a recurring revenue stream layered on top of the initial equipment sale. The company was spun off from the original Hewlett-Packard to focus specifically on life sciences and chemical analysis instruments, separate from HP's computing and printing businesses.