Technology is a collection of techniques, skills, methods and processes used in the production of goods or services or in the accomplishment of objectives like scientific investigation and it can be a knowledge of techniques, processes, etc. and it can be embedded in machines, computers, devices and factories which can be operated by individuals without detailed knowledge of the workings of such things.
Science is a reasoned investigation or study of natural phenomena which is aimed at discovering enduring principles among some elements of the phenomenal world by employing formal techniques such as the scientific method whereas technologies are not usually exclusively products of science because they have to satisfy requirements like utility, usability and safety.
Engineering is a goal oriented process of designing and making tools and systems to exploit the natural phenomena for practical human means often using results and techniques from science and the development of technology can draw upon many fields of knowledge including scientific, engineering, mathematical, linguistic as well as historical knowledge to achieve some practical result.
It is often a consequence of science and engineering and technology as a human activity precedes the two fields and this new found knowledge may then be used by engineers to create new tools and machines like semiconductors, computers and other forms of advanced technology. Scientists as well as engineers may both be considered technologists and the three fields are often considered as one for the purposes of research and reference.
It is properly defined as any application of science to accomplish a function and the science can be leading edge and well established and the function can have high visibility or be significantly more mundane but it is a technology and its exploitation is the foundation of all competitive advantage. Technology based planning is what was used to build the industrial giants and it what was used to transform any country into a superpower and it was not economic based planning.