Complex sentence: Hitachi-LG Data Storage (abbreviated HL-DS) is a joint venture between Hitachi and the LG which is specialised in manufacturing optical data storage devices such as CD and DVD drives for desktop and notebook OEM.
Split into simpler sentences: Hitachi-LG Data Storage (abbreviated HL-DS) is a joint venture between Hitachi and the LG. The company is specialised in manufacturing optical data storage devices such as CD and DVD drives for desktop and notebook OEM.