When it comes to Industry 4.0, Augmented Reality (AR) is regularly referenced as the up and coming interface innovation for communication and collaboration between humans and machines. Innovative technological advances have removed some of the central technological limitations in recent years and AR applications with restricted functionality are presently abundant and can be downloaded as applications onto most mobile devices. Although it is a key technology development, that promises to change many industries, their utilization is restricted generally to entertainment and marketing applications. The use of augmented reality in industrial applications (IAR), is simply beginning to wind up progressively. We can understand Augmented Reality technology as an intuitive interface that allows us to see through the real and the digital world. Over the direct comparison of real-world objects with virtual planning data, planning errors in production environments can be detected faster and more efficiently. The available literature of the areas above mentioned will be reviewed in this paper, in order to analyze the underlying challenges and the existing technologies involving IAR, in particular in assembly and picking activities.