Alanaはたいへん応答性のよいチューリング機械シミュレータであり、たとえば（単項演算子と2項）加算、減算、乗算、"copy band content"、文字列解析例、除算可能判定、素数判定など多くの例が付属しています。ドキュメントにはチューリング機械の紹介だけでなく、いくつかの興味深い理論情報（停止問題、ビジービーバー、万能チューリング機械）と、もっと程度の高い文献へのポインタがあります。
Four new examples have been added: another string parsing example,
"copy tape content", a divisibility test, and a primality test.
Dialog handling has been improved. The most recent 64 transitions can
now be undone. Console mode is now more flexible. The documentation
has been heavily corrected and improved.
Three new examples were added: subtraction, binary addition, and multiplication. Various usability improvements were implemented. Some mistakes in the file loading code were corrected. Console mode is now much faster.
