Still, the Pennsy managed to add 15 Baldwin switchers and one EMD switcher. Sixx also uses Audiotech Guitar Products Source Selector 1X6 Rack Mount Audio Switcher. Common implementations of flip switching include Flip 3D in Windows and Shift Switcher in Compiz. The flip switcher is an enhancement to the Alt-Tab switching feature. The ALCO RS-3 is a , B-B road switcher diesel-electric locomotive. NS has also introduced an experimental battery-electric switcher locomotive, NS 999. The hood unit evolved from the switcher locomotive. Flip 3D is a supplemental task switcher. He started with a task switcher in Intel 80386 assembly language and a terminal driver. This initial generation system is essentially a real-time four-channel video switcher. English also commanded a video switcher that controlled what was displayed on the big screen. Microsoft Windows 3.0 first introduced a window switcher in 1990. The offering also includes Outlook.com and OneDrive which are accessible through a unified app switcher. At NAB Show 2010 NewTek announced its TCXD850, a rack-mountable 8-input switcher with 22 channels. Windows 3.0 first introduced a window switcher in 1990.