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The physical layouts of the first generations of Intel microprocessors were first hand drawn on graph paper. A technician would then use a coordinatograph to precisely cut the rubylith (laminated onto a transparent plastic such as mylar) and a knife to peel the appropriate sections away while it was resting on the light table.
Software compatibility is a characteristic of software components or systems which can operate satisfactorily together on the same computer, or on different computers linked by a computer network. It is possible that some software components or systems may be compatible in one environment and incompatible in another.
Binary-code compatibility (binary compatible or object-code compatible) is a property of a computer system, meaning that it can run the same executable code, typically machine code for a general-purpose computer central processing unit (CPU), that another computer system can run.
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Screen printing is a printing technique where a mesh is used to transfer ink (or dye) onto a substrate, except in areas made impermeable to the ink by a blocking stencil.A blade or squeegee is moved across the screen in a "flood stroke" to fill the open mesh apertures with ink, and a reverse stroke then causes the screen to touch the substrate momentarily along a line of contact.
Tape systems attempt to alleviate the intrinsic long latency, either using indexing, where a separate lookup table (tape directory) is maintained which gives the physical tape location for a given data block number (a must for serpentine drives), or by marking blocks with a tape mark that can be detected while winding the tape at high speed.
Stencils are frequently used by official organizations, including the military, utility companies, and governments, to quickly and clearly label objects, vehicles, and locations. Stencils for an official application can be customized, or purchased as individual letters, numbers, and symbols.
For fine pitch stencils (smaller 20 mils pitch, 10 mils aperture), even with a 5 mils stencil, which is the most commonly used stencil thickness, the area ratio is below 1.5. This necessitates the use of a thinner stencil. For BGA/CSP and other very small apertures, the area ratio is used.