Fuente: WIPO "honey" Apparatus for producing slides for use in the assembly of components on a printed circuit board comprises a support consisting of a base plate (1), a strut (2) and a platform (3) and an elongate member (4) mounted in a bearing located in a bore in the platform (3). A first pointed member (16) is mounted at one end of the elongate member (4) for tracing details of a printed circuit board to be produced and a second pointed member (31) is mounted at the other end of the elongate member (4). Holding means in the form of an apertured plate (32), locating pegs (35, 36) and clamps (37) are provided for holding a glass slide (42) in a position to be contacted by the second pointed member (31) which projects through the aperture in the plate (32). The arrangement is such that movement of the first pointed member (16) to trace circuit components on a specimen circuit board (41) located on the base plate (1) is effective to cause the second pointed member (31) to mark the slide (42) to indicate the desired positions of the said circuit components.