RoHS stands for Restriction of Hazardous Substances. RoHS, also known as Directive 2002/95/EC, originated in the European Union and restricts the use of specific hazardous materials found in electrical and electronic products (known as EEE). All applicable products in the EU market after July 1, 2006 must pass RoHS compliance. The substances banned under RoHS are lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (CrVI), polybrominated biphenyls (PBB), polybrominated diphenyl ethers (PBDE), and four different phthalates (DEHP, BBP, BBP, DIBP). RoHS Lenovo ThinkCentre M78, 3.6 GHz, AMD A6, 4 GB, 500 GB, DVD±RW, Windows 7 Professional Lenovo ThinkCentre M78. Processor frequency: 3.6 GHz, Processor family: AMD A6, Processor model: A6-5400B. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1866 MHz. Total storage capacity: 500 GB, Optical drive type: DVD±RW. On-board graphics card model: AMD Radeon HD 7540D. Operating system installed: Windows 7 Professional, Operating system architecture: 64-bit. Power supply: 280 W. Chassis type: Tower. Product type: PC. Product colour: Black