Since the development of the machine designed by Alan Turing to thepresent day, the human-computer interfaces have been progressing in variousfields at the rate of use.Initially, computers derived from Turing machine (1936), responded tomathematical needs and its applications focused just to the scientific field;and like almost every technological development was promoted to improve the warperformance.In this process, we generally recognize as some of the major milestonesthe Z1 (1938) by Konrad Zuse, the Harvard Mark I (1944) by Howard H. Aikenteam, Colossus (1944) by Tommy Flowers, the ENIAC (1946) from the University ofPennsylvania, the binary EDVAC (1951) conceived by John von Neumann, the IBM650 of serial production (1953) and the IBM 360 with integrated circuit boards(1964).It is perhaps from this moment, that together with the development ofprocessors and commercial microprocessors from Intel, advances in software andhardware introduced by Apple, IBM and Microsoft were added, allowing to extendthe use of computer professionals in the applied sciences. These developmentsand massive applications, forced to think and devise better human-computerinterfaces. Many of these ideas resulted in progress for the development ofergonomic keyboards, the integration of Mouse and logical software, which havenot stopped until today. However, it is crucial to analyze which other impacts have producedthese advances in computers. In the domestic sphere, from the 80s interfacesand digital-logic processing were introduced into our daily lives, digitalwatches first, then the management of VHS video recorders. Subsequently the TV, audio equipment, mobile and dashboards ofvehicles (90s); white line products and the remaining electrical appliances(early 2000s).All the technical and scientific disciplines and professions from allthe areas were progressing with the improvements offered by the development ofnew human-computer interfaces. At first, it was required hyper-specializationto operate the technologies in each discipline, however, at the present stageof development, each profession can take full advantage (and in an intuitiveway) of the most advanced technologies to achieve the highest standards intheir discipline work.All the technical and scientific disciplines and all areas professionswere progressing with the improvements were offering the development of newhuman-computer interfaces. Initially, hyper-specialization required to operatethe technologies in each discipline, however at this stage of development, eachprofession can make the most (and intuitively) most disruptive technologies toachieve the highest standards in their work discipline.The wealthiest socioeconomic segments of Generation X, were able toexperience these advances from the different microcomputers and personalcomputers: Texas Instruments TI-99/4A (1981), Commodore 64 (1982), MicrodigitalTK 83 (1982), Sinclair ZX Spectrum (1982), Microdigital TK 85 (1983), IBMPersonal Computer XT (1983), IBM Personal Computer / AT (1984), Apple Macintosh128K (1984), Microdigital TK 90x (1985), Commodore 128 (1985), IBM PersonalSystem / 2 (1987), IBM PS / 1 (1990); gradually enjoying improvements in thespeed, visual interfaces, the addition of color and sound, Mouse, TrackBall, TouchPad,camera, microphone, the several operational programs (software), among others.At the present stage of development of human-computer interfaces, issuesof the ongoing investigation by the different universities and centers ofscientific and technological development show that the challenges are centeredon readings and optical projections (2D, 3D and holographic) for its operation,the decoding of gestures, direction and focus of the eyes and variousapplications of these advances to improve the physical and visual ergonomics, theautomation, education, e-government and public and private management.In order for these progress achieved greater intensity and speed on itsdevelopment, it is important to systematize the existing information, ideas,research and analysis of results. Other key is to spread the different digitalresources to "connect the dots" as Steve P. Jobs (2005) said, toproduce innovations, tangible improvements that society can take advantage andenjoy.This Handbook of Research on Human-Computer Interfaces, Developments,and Applications, represents a commitment of researchers from different universitiesof the world, who want to improve the relationship between man and machine,looking for more people to use computer technology and thereby achieve greaterwelfare for the whole of society.We are pleased to invite you to this exciting challenge, to discoverwhat these researchers are thinking for our future, which successes they haveachieved and what their next challenges will be.We hope that readers can find "new dots" in this valuablecompilation of articles, to develop new ideas, designs and innovations, whichhelps bring further progress in this interdisciplinary field.