POP-Keskus Oy is a provider of products and services such as typewriter types,typewriter keys,typewriter platens,typists copyholders,typewriter attachments, continuous form feeding,typewriter ribbon spools,typewriters, mechanical,typewriters, electromechanical,typewriters, electronic,lettering machines for self-adhesive tape,shorthand machines,typewriters for blind persons, braille,typewriter ribbons,teleprinters.