PGAEncodeRealAsGrayCode(3) on Linux
The text 90777de32d3c, as Debian 3.1 (Sarge), Debian 3.0 (Woody), Debian 2.2 (Potato), Debian 2.1 (Slink), Debian 2.0 (Hamm), Debian 1.3 (Bo), Debian 1.2 (Rex) shipped it. The page shows this text now.
encodes a real value as a binary reflected Gray code sequence