The word schedule is interesting on several counts. First, the pronunciation. In Britain the usual pronunciation is 'shed-ule', whereas in American English it's 'sked-ule'. The word, rarely referring to something on paper these days, is a diminutive of the Latin sceda, papyrus leaf (it could also be written scheda in medieval Latin). Schedule has been the accepted spelling since the mid-17th century. The original pronunciation was sed-ule; this pronunciation is rare these days. The reason for the differences in pronunciation is because the 'shed-ule' spelling shows the influence of French in British English, whilst 'sked-ule' is a nod to the Greek origin of the word. The original definition of schedule (late 14th century; OED) is: 'A slip or scroll of parchment or paper containing writing; a ticket, label, placard; a short note'. Shortly afterwards the meaning widened to 'In wider sense, any tabular or classified statement, esp. one arranged under headings prescribed by official authority, as, e.g. an insolvent's statement of assets and liabilities, a return of particulars liable to income or other tax, and the like. Also occas. a blank form to be filled up by the insertion of particulars under the several headings' (OED). This meaning is still used today when we talk of UK Income Tax Schedules A and D (Schedules B, C, E and F have been abolished) - meaning the tax return forms we need to fill in. The current meaning of schedule - timetable - only came about in the mid-19th century.