Transparent Electronics is a technology which focuses on transparent electronic circuits and materials that can be used for fabricating such circuits. The main requirement of this technology is a material which is electrically conductive and optically transparent. The use of TCO (transparent conductive oxides) such as p-type TCO along with n-type TCO such as indium-tin oxides, has made the fabrication of transparent bipolar electronic devices feasible. ZnO is direct wide band gap semiconductor (e.g 3.4 eV) with high transparency on the whole visible range and resistivity that can be varied from semi-insulating to semi-metallic by doping. Such transparent conducting oxides combine conductivity with high transparency and have wide variety of applications, such as transparent solar panel, flat panel display , auto-mobile windshields, touch display panels, real time wearable display , navigation display in military , optical sensor etc. Transparent TFT(Thin-film transistor) has also been developed which is highly transparent and which is suitable for use in Active matrix LCD. The first part of this paper reviews TCO. Consequent part discusses TTFT. The later part focuses on applications and future scope.