 | PSS 21H-4B2 B4 | Color PostScript Printer | 1098 | 4 | 1.1 MB |
| PSS 21H-4B3 B4 | Dot-Matrix Printer 80 (Replaced by PSS 31H-4B3) | 0608 | 4 | 718 KB |
| PSS 21H-4B5 B4 | 132-Column Color Dot-Matrix Printer (Replaced by PSS 31H-4B5) | 0608 | 4 | 397 KB |
| PSS 21H-4B7 B4 | Line Printer | 0589 | 4 | 298 KB |
| PSS 21H-4B9 B4 | Color Ink-Jet Printer | 0589 | 4 | 252 KB |
| PSS 21H-4C1 B3 | Command Center | 0608 | 12 | 1.6 MB |
| PSS 21H-4C2 B3 | Time Synchronization Equipment (Replaced by PSS 31H-4C2) | 1213 | 16 | 875 KB |
| PSS 21H-4D1 B3 | Workstation Components | 0910 | 12 | 4.2 MB |
| PSS 21H-4D2 B4 | Modular Industrial Console | 1100 | 12 | 2.0 MB |
| PSS 21H-4D3 B4 | Modular Industrial Workstations | 1100 | 8 | 2.0 MB |
| PSS 21H-4D8 B4 | 50 Series 16-Inch Table-Top Display | 0492 | 2 | 337 KB |
| PSS 21H-4D10 B4 | Liquid Crystal Display (LCD) Monitors (Replaced by PSS 31H-4VDU) | 0114 | 12 | 2.4 MB |
| PSS 21H-4D11 B4 | 21-Inch Workstation Display | 0900 | 4 | 2.5 MB |
| PSS 21H-4D12 B4 | Model P93 Workstation for Windows NT Operating System | 0402 | 4 | 379 KB |
| PSS 21H-4D13 B4 | Model H92 and P92 Workstations for Windows 7 Professional Operating System (Replaced by PSS 31H-4D13, PSS31H-4H92) | 0113 | 12 | 568 KB |
| PSS 21H-4E1 B4 | Annunciator Keyboard/Panel (Replaced by: 31H-4USBKBD) | 0113 | 12 | 1.5 MB |
| PSS 21H-4E2 B4 | 17-Inch Workstation Display | 1098 | 2 | 243 KB |
| PSS 21H-4E4 B4 | Alphanumeric Keyboard, Mouse, and Trackball (Replaced by: PSS 21H-4D1 B3 Feb 2000) | 0996 | 4 | 854 KB |
| PSS 21H-4E6 B4 | 50 Series Workstation Processor WP51, Style E | 0998 | 4 | 213 KB |
| PSS 21H-4E7 B4 | Workstation Processor 30 | 1190 | 4 | 188 KB |
| PSS 21H-4E8 B4 | 50 Series Workstation Processor WP51, Styles B and B1 | 0397 | 4 | 896 KB |
| PSS 21H-4E9 B4 | 50 Series Workstation Processor WP51, Style B | 1295 | 4 | 802 KB |
| PSS 21H-4E10 B4 | 50 Series Workstation Processor WP51, Style D | 1299 | 4 | 329 KB |
| PSS 21H-4F1 B4 | NEMA 4/4X Hardened Enclosure | 0397 | 4 | 192 KB |
| PSS 21H-4G1 B3 | Model 51 X Terminal | 0495 | 8 | 1.0 MB |
| PSS 21H-4H1 B3 | Tank Inventory Management Systems | 0890 | 20 | 1.9 MB |
| PSS 21H-4P1 B3 | Personal Workstation | 1196 | 8 | 1.1 MB |
| PSS 21H-4P1 B4 | Personal Worstation for Operators and Engineers (PW-OE) (formerly known as PW) | 1196 | 4 | 421 KB |
| PSS 21H-4P3 B4 | Personal Workstation for Off-Line Configuration (PW-C) | 1196 | 4 | 719 KB |
| PSS 21H-4P5 B4 | Personal Worstation for Fieldbus Interface (PW-FB) | 1196 | 8 | 438 KB |
| PSS 21H-4P7 B4 | Personal Workstation for SINGLE STATION MICRO Controller Interface (PW-SSI) | 1094 | 4 | 813 KB |
| PSS 21H-4P11 B4 | Personal Worstation for Small Nodebus Control System (PW-NB) | 1196 | 8 | 371 KB |
| PSS 21H-4Q1 B3 | Personal Workstation Scalable Solutions | 1196 | 4 | 1.0 MB |
| PSS 21H-4R1 B3 | 50 Series Application Workstation Model AW51 | 0200 | 12 | 2.6 MB |
| PSS 21H-4R2 B4 | 50 Series Application Workstation Processor, AW51, Style D | 1299 | 8 | 870 KB |
| PSS 21H-4R3 B4 | 50 Series Application Workstation Processor, Model AW51 | 1293 | 0 | 875 KB |
| PSS 21H-4R4 B4 | 50 Series Application Workstation Processor, AW51, Style B and B1 | 0397 | 0 | 1.1 MB |
| PSS 21H-4R5 B4 | 50 Series Application Workstation Processor, AW51, Style C | 0397 | 0 | 358 KB |
| PSS 21H-4R6 B4 | 50 Series Application Workstation Processor AW51, Style E | 0900 | 8 | 899 KB |
| PSS 21H-4R7 B4 | Model P79 Workstation Solaris 8 Operating System | 0608 | 8 | 598 KB |
| PSS 21H-4R8 B4 | I/A Series A2 Model P80 Workstation Solaris 8 Operating System | 0103 | 4 | 705 KB |
| PSS 21H-4S1 B3 | Application Workstation Scalable Solutions | 0398 | 8 | 1.0 MB |
| PSS 21H-4T1 B3 | VT100 Compatible Terminal | 0789 | 4 | 361 KB |
| PSS 21H-4U1 B3 | 70 Series Workstations | 0501 | 8 | 1.0 MB |
| PSS 21H-4U2 B4 | Application Workstation 70, Style A Windows NT Operating System | 0501 | 8 | 973 KB |
| PSS 21H-4U3 B4 | Workstation Processor 70 Windows NT Operating System | 0501 | 8 | 972 KB |
| PSS 21H-4U4 B4 | Application Workstation 70, Style B | 0501 | 8 | 975 KB |
| PSS 21H-4U5 B4 | Model P95 Workstation Servers for Windows Windows NT Server 4.0, Terminal Server Edition | 0502 | 4 | 394 KB |
| PSS 21H-4U6 B4 | Model H91 Workstation Servers for Windows Server 2008 R2 Operating System (Replaced by PSS 31H-4H91) | 0113 | 16 | 638 KB |
| PSS 21H-4U7 B4 | Model P81 Solaris Based Workstation | 0608 | 8 | 551 KB |
| PSS 21H-4U8 B4 | Model P82 Solaris Based Workstation | 0608 | 8 | 284 KB |
| PSS 21H-4U12 B4 | Model H90 Workstation Servers for Windows Server 2008 R2 Operating System (Replaced by PSS 31H-4H90) | 0113 | 12 | 773 KB |
| PSS 21H-4U13 B4 | Thin Clients (Replaced by PSS 31H-4THNCLT) | 0413 | 16 | 337 KB |
| PSS 21H-4U14 B4 | Virtualization Server Host Hardware Model V90 (Replaced by: PSS 31H-4V90) | 0413 | 12 | 501 KB |
| PSS 21H-4V1 B3 | Application Workstation 51 Integrator | 0998 | 8 | 1014 KB |
| PSS 21H-4W1 B3 | Mobile Workstation Overview | 0799 | 4 | 174 KB |
| PSS 21H-4W2 B4 | Mobile Workstation Indoor Unit | 0300 | 8 | 138 KB |
| PSS 21H-4W3 B4 | Mobile Workstation Premium Indoor and All-View Units | 0300 | 4 | 147 KB |
