diff --git a/cond-expand.scm b/cond-expand.scm
new file mode 100644
index 0000000..21e1f25
--- /dev/null
+++ b/cond-expand.scm
@@ -0,0 +1,19 @@
+(id and)
+(args expr ...)
+(description "True iif every expr is true. [SRFI 0]")
+
+(id not)
+(args expr)
+(description "True iif expr is false. [SRFI 0]")
+
+(id or)
+(args expr ...)
+(description "True iif at least one expr is true. [SRFI 0]")
+
+(id library)
+(args name)
+(description "True iif library name is importable. [R7RS]")
+
+(id compilation-target)
+(args ...)
+(description "[Gambit]")