SRFI 0: Feature-based conditional expansion construct, using cond-expand - see Syntax and conditional compilation.

SRFI 1: List Library, if (require 'list-lib) - see SRFI-1.

SRFI 2: AND-LET*: an AND with local bindings, a guarded LET* special form.

SRFI 4: Homogeneous numeric vector datatypes - see Uniform vectors.

SRFI 6: Basic String Ports - see Ports.

SRFI 8: receive: Binding to multiple values - see Multiple values.

SRFI 9: Defining Record Types, using define-record-type - see Record types.

SRFI 10: #, external form for special named types. This is deprecated for various reasons, including that it conflicts with syntax-case unsyntax. Better to use srfi-108 Named quasi-literals.

SRFI 11: Syntax for receiving multiple values, using let-values and let*-value - see Multiple values.

SRFI 13: String Library. Needs some polishing.

SRFI 14: Character-set Library - see Character sets.

SRFI 16: Syntax for procedures of variable arity, using case-lambda.

SRFI 17: Generalized set! - see Locations.

SRFI 23: Error reporting mechanism, using error - see Exceptions.

SRFI 25: Multi-dimensional Array Primitives - see Arrays.

SRFI 26: Notation for Specializing Parameters without Currying - see Procedures.

SRFI 28: Basic Format Strings - see Format.

SRFI 30: Nested Multi-line Comments.

SRFI 35: Conditions.

SRFI 37: args-fold - a program argument processor, if (require 'args-fold).

SRFI 38: External Representation for Data With Shared Structure. The read-with-shared-structure is missing, but subsumed by read.

SRFI 39: See Parameter objects.

SRFI 41: Streams - see Streams.

SRFI 45: Primitives for Expressing Iterative Lazy Algorithms - see Lazy evaluation.

SRFI 60: Integers as Bits. - see Logical Number Operations.

SRFI 62: S-expression comments.

SRFI 64: A Scheme API for test suites.

SRFI 69: Basic hash tables - see Hash tables.

SRFI 87: => in case clauses.

SRFI 88: Keyword objects - see Keywords.

SRFI 95: Sorting and Merging.

SRFI 97: Names for SRFI Libraries.

SRFI 98: An interface to access environment variables

SRFI 101: Purely Functional Random-Access Pairs and Lists - see SRFI-101.

SRFI 107: XML reader syntax - see XML literals.

SRFI 108: Named quasi-literal constructors - see Named quasi-literals.

SRFI-109: Extended string quasi-literals - see string quasi-literals.

SRFI-118: Simple adjustable-size strings (string-append! and string-replace!).

SRFI-140: Immutable Strings.

SRFI-163: Enhanced array literals.

SRFI-164: Enhanced multi-dimensional Arrays