Needle free injection technology was developed to reduce the number of needle stick accidents and associated problems. A comprehensive literature review was completed regarding needle free injection technology and its applications. advantages over needle injections. their components and types such as powder injection. https://www.roneverhart.com/Western-Digital-Ultrastar-DC-HC570-WUH722222ALE6L1-22TB-7-2K-RPM-SATA-6Gb-s-512e-SED-3-5in-Recertified-Hard-Drive/