use the Q-Bus as their principal bus: PDP-11/03 (also known as the LSI-11/03) – The first PDP-11 implemented with large-scale integration ICs, this system uses a four-package MCP-1600 chipset from Western Digital and supports 60 KB of memory. – Second generation of LSI (F-11). Early units supported only 248 KB of memory. PDP-11/23+/MicroPDP-11/23 – Improved 11/23 with more functions on the (larger) processor card. By mid-1982, the 11/23+ supported 4 MB of memory. MicroPDP-11/73 – The third generation LSI-11, this system uses the faster "Jaws-11" (J-11) chip set and supports up to 4 MB of memory. MicroPDP-11/53 – Slower 11/73 with on-board memory. MicroPDP-11/83 – Faster 11/73 with PMI (private memory interconnect). MicroPDP-11/93 – Faster 11/83; final DEC Q-Bus PDP-11 model. KXJ11 – Q-Bus card (M7616) with PDP-11 based peripheral processor and DMA controller. Based on a J11 CPU equipped with 512 KB of RAM, 64 KB of ROM, and parallel and serial interfaces. Mentec M100 – Mentec redesign of the 11/93, with J-11 chipset at 19.66 MHz, four on-board serial ports, 1-4 MB of on-board memory, and optional FPU. Mentec M11 – Processor upgrade board; microcode implementation of PDP-11 instruction set by Mentec, using the TI 8832 ALU and TI 8818 microsequencer from Texas Instruments. Mentec M1 – Processor upgrade board; microcode implementation of PDP-11 instruction set by Mentec, using Atmel 0.35 μm ASIC. Quickware QED-993 – High performance PDP-11/93 processor upgrade board. DECserver 500 and 550 LAT terminal servers DSRVS-BA using the KDJ11-SB chipset Models without standard bus PDT-11/110 PDT-11/130 PDT-11/150 The PDT series were desktop systems marketed as "smart terminals". The /110 and /130 were housed in a VT100 terminal enclosure. The /150 was housed in a table-top unit which included two 8-inch floppy drives, three asynchronous serial ports, one printer port, one modem port and one synchronous serial port and required an external terminal. All three employed the same chipset as used on the LSI-11/03 and LSI-11/2 in four "microm"s. There is an option which combines two of the microms into one dual carrier, freeing one socket for an EIS/FIS chip. The /150 in combination with a VT105 terminal was also sold as MiniMINC, a budget version of the MINC-11. PRO-325 PRO-350 PRO-380 The DEC Professional series are desktop PCs intended to compete with IBM's earlier 8088 and 80286 based personal computers. The models are equipped with 5 inch floppy disk drives and hard disks, except