The Caroline Island Script is a syllabary used in the Caroline Islands until the mid-20th century. The Caroline Islands is the old name for the Woleai group of islands in Central Micronesia in the Pacific. Some of the symbols are obviously based on Latin letters; the origin of the other symbols is not known. The script was first described during the early 20th century by Western travelers.
The script symbols and transliteration comes from Michael Everson's proposal to encode the Caroline Island Script in Unicode: http://www.evertype.com/standards/iso10646/pdf/woleai.pdf (PDF, 123K)
Caroline Island Script: a study site devoted to an indigenous script of the Pacific islands
Some information about the Caroline Island Script
Woleaían - stories in Woleaian
Information about the Caroline Islands