# ACL2 Version 6.3 News

## Table of Contents

- ACL2 sources availability between releases
- VSTTE 2012 Competition
- ACL2 Books Repository
- Performance Comparisons

## ACL2 sources availability between releases

ACL2 sources are now available between releases, as described in this announcement.

## VSTTE 2012 Competition

A team of four ACL2 users entered the VSTTE 2012 competition. For information, including the team's solution, visit this link.

## ACL2 Books Repository

The acl2-books Google group allows you to contribute ACL2 books (input files), and also to update to the latest version if you don't want to wait for the next ACL2 release. Quoting from that web site:

> This site is for community-driven development for the basic ACL2 libraries, which deal with topics like arithmetic, data structures, and hardware modelling. We're working with the authors of ACL2 and our changes are eventually incorporated into official ACL2 releases.

## Performance Comparisons

To appear