Mat Peck This version of Niall is shareware. Some of the facilities have been disabled. You can buy the full version from Mat if you register. NIALL stands for Non-Intelligent AMOS Language Learner. This version is a vast improvement on the previous PD program both in presentation and ease of use. You can have great fun trying to converse with the computer. There are also some source code programs on the disc which require AMOS to run.