• Serial Asynchronous Data Transmission
  
  
• RS232
• RS422
• RS485 bus systems
• 20mA / TTY
• Plastic fiber optics
• Glass fiber optics
• W&T-internal serial TTL interface
• USB
  
  
• Printer interface
• IEEE488

Technical articles:

• RS232 and I/O directly to the Ethernet
• IT-compliant electrical installation
• In defense of RS232
• New fiber-optic cables are much more easily installed than copper cables

Glossaries:

• Little glossary of Internet terms
• Little glossary of network cabling terms