Friends may seem to have ' lost the plot ' whilst you simply mislay key pieces of paper.
The downloadable service from the Casio website means that help is at hand should you mislay or lose the original instructions.
In his absent-minded way Tennyson was very apt to mislay objects; in earlier life he had lost the MS. of Poems, chiefly Lyrical, and had been obliged to restore the whole from scraps and memory.