“…Spelling applications are our key focus of this review. Nevertheless, it is worth mentioning that BCIs are applied for a lot of other purposes, e.g., robot control [ 115 , 116 , 117 ], wheelchair control [ 118 , 119 ], web browsing [ 120 ], general control of an operating system with a virtual keyboard, as presented in [ 121 ], gaming [ 122 ], every-day electronic device control [ 123 , 124 , 125 ], and ADHD attention training [ 126 ], just to mention a few. A lot of these applications are also useful for people with neuromuscular malfunctions, and a number of them can be suitable for healthy users.…”