HP 27140-69001 - CIO 6-CHANNEL RS-232C MUX I/O board - CIO 6-Channel RS-232C MUX I/O Board (P/O 27140A) Retail
HP 5062-3308 - HP-FL CIO disk interface - CIO HP-FL Disk Interface (27111A or 27115A) - Requires PBA Retail
HP 5062-3303 - CIO HP-IB interface board - CIO HP-IB Interface Board (27113A) - Requires PBA Adapter Retail
HP 28641-60015 - HP ThinLAN (10Base-2) transceiver - Has AUI and BNC connectors - (28641B) - Plugs into the AUI port Retail