tirdbl Development Notebook

* Directory name restrictions

** TOPS-20

- Maximum length 39 characters
- Valid characters: A-Z, a-z (case insensitive), 0-9, $.-_
- Wildcard characters: *, %

** Unix

- Maximum length depends on implementation (255 is common)
- Valid characters: A-Z, a-z (case sensitive), 0-9, ._-,(?!)
- Wildcard characters: *, ?
- Avoid characters: &%$|^/\~"<>();#: space
- Avoid as initial character: -
- '.' and '..' are reserved