* Transposition:: Swapping two portions of a buffer.
* Registers:: How registers are implemented. Accessing
the text or position stored in a register.
-* Atomic Changes:: Installing several buffer changs ``atomically''.
+* Atomic Changes:: Installing several buffer changes ``atomically''.
* Base 64:: Conversion to or from base 64 encoding.
* MD5 Checksum:: Compute the MD5 ``message digest''/``checksum''.
* Change Hooks:: Supplying functions to be run when text is changed.