- if
- Section 7.1.1 
- init
- Section 1.3.1, Section 1.5.6 
- initialization files
- Section 3.1 
- input field separator
- Section 3.2.4.1, Section 3.2.5, Section 6.3 
- interactive editing
- Section 5.2 
- interactive scripts
- Section 8.1 
- interactive shell
- Section 1.2.2.2.1, Section 1.2.2.2.2, Section 1.2.2.3.3 
- invocation
- Section 1.2.2.1