Documentation

• of Internet technology
• of some check sums
• of Unix basics
• of Miscellanea

Internet Technology Short Manuals

Quick overviews of some protocols, standards, and common practices on the Internet.

• IP Addresses
• POP - Post Office Protocol, version 3
• SMTP - Simple Mail Transfer Protocol
• Mail System Status Codes (RFC 1893)
• CGI - Common Gateway Interface
• SSI - Server Side Includes
• Robot Exclusion
• Cookies

And some other things worth knowing about:

• How much is a kilobyte?
• Of URLs, URIs, and URNs
• Bytes vs. Octets
• Of Internets, Intranets, and Extranets

Check Sums

When entering numbers, humans sometimes make errors. Check sums are designed to detect these errors, so they can be reported. Two examples are reported below.

• The ISBN check sum
• Matrikelnummern and the "IBM check"

Unix

Some quick notes about basic Unix concepts.

• Streams, files, and file types
• File access permissions
• Programs and processes
• Users and groups

Miscellanea

• Managing Bibliographies with BibTeX
• Regular Languages and Regular Expressions
• ArcView 3.2 GeoProcessing wizard peculiarity