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PCL 5e (PCL 5 enhanced) was released on the HP LaserJet 4 in October 1992 and added bi-directional communication between the printer and the PC and Windows fonts. PCL 5c introduced color support on the HP PaintJet 300XL and HP Color LaserJet in 1992. PCL 6 overview. HP introduced PCL 6 around 1995 with the HP LaserJet 4000 series printers.
HP ePrint via Email is a feature of most HP printers and MFPs that enables printing documents attached to email messages sent to the device. The HP ePrint-capable printer or MFP must be registered to an HP ePrint cloud service called HP ePrint Center, which assigns a unique email address to the printer or MFP.
HP Universal Print Driver (UPD) is an intelligent print driver that supports a broad range of HP LaserJet printers and MFPs. Developed by Hewlett-Packard , it combines a general purpose driver (UNIDRV or PSCRIPT ) and HP proprietary extensions.
An HP-41C that flew on nine early Space Shuttle missions is on display in the National Air and Space Museum in Washington, D.C. HP-41Cs with some special hardware configurations (the addition of Velcro strips, pre-production time module, and louder beeper, as well as the removal of parts whose outgassing could cause contamination) were carried on early Shuttle missions for the purpose of ...
HP Jetdirect is the name of a technology sold by Hewlett-Packard that allows computer printers to be directly attached to a Local Area Network. The "Jetdirect" designation covers a range of models from the external 1 and 3 port parallel print servers known as the 300x and 500x, to the internal EIO print servers for use with HP printers.
Many devices that interface using this mode support RLE compression. ECP can provide up to 2.5 MByte/s of bandwidth, which is the natural limit of 8-bit ISA DMA.  An ECP interface on a PC can improve transfers to pre-IEEE-1284 printers as well, by reducing the CPU load during the transfer; however, the transfer in that case is unidirectional.
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3D printing or additive manufacturing is the construction of a three-dimensional object from a CAD model or a digital 3D model. It can be done in a variety of processes in which material is deposited, joined or solidified under computer control, with material being added together (such as plastics, liquids or powder grains being fused), typically layer by layer.