A mnemonic based on every 5th item to be remembered, using one's fingers as a kind of abacus. You put up one
finger for each one as you go along. When you reach the fifth
finger, that becomes the
first letter of the mnemonic. This device works well when the number of entities to be recalled is too large for conventional mnemonics to easily accommodate.
Example: Nlnci Sjgai is
one possible pentamnemonic for all the countries with some coastline on the continent of Eurasia. If you start with the western-most point-Portugal-and go clockwise around the coast, your first 'bookmark country' is Netherlands, and you end with
Italy. (Just add on Monaco, the 51st country) Portugal, Spain,
France, Belgium, NETHERLANDS: Germany, Denmark,
Poland, Estonia, LITHUANIA. When your little finger gets extended, you must always arrive on a country that begins with one of the consecutive letters in Nlnci Sjgai, or you forgot a country.