System/6000 (RS/6000) is a family of RISC-based Unix servers, workstations and supercomputers made by IBM in the 1990s. The RS/6000 family replaced the IBM RT PC
The IBM System p is a high-end line of RISC (Power)/UNIX-based servers. It was the successor of the RS/6000 line, and predecessor of the IBM Power Systems
variety of hardware platforms, including the IBMRS/6000 series and later Power and PowerPC-based systems, IBM System i, System/370 mainframes, PS/2 personal
rebranded from: IBMRS/6000 to IBM eServer pSeries, p for POWER IBM AS/400 to IBM eServer iSeries, i for Integrated IBM Netfinity to IBM eServer xSeries
The IBM ThinkPad Power Series (and subsequent IBMRS/6000 Model 860 Notebook) (800/820/821/822/823/850/851/860) is a laptop series from the ThinkPad line