Alternative and Augmentative Communication (AAC) systems refer to methods, strategies, tools, and technologies that support or replace spoken or written language for individuals who experience difficulties in communication. These systems are designed for people who have temporary or permanent speech, language, or communication impairments due to conditions such as cerebral palsy, autism spectrum disorder, intellectual disability, multiple disabilities, hearing impairment, traumatic brain injury, stroke, motor neuron disease, aphasia, or other neurological disorders. The primary objective of AAC is to enable individuals to express their thoughts, feelings, needs, preferences, and ideas effectively, thereby promoting participation, independence, inclusion, and quality of life. The term "alternative" refers to communication methods that replace speech when an individual cannot rely on spoken language. "Augmentative" refers to methods that supplement existing speech when verbal communication alone is insufficient. AAC is not intended to discourage speech development; rather, research has consistently shown that AAC often supports and enhances speech, language, literacy, and social interaction. It provides individuals with a reliable means of communication while encouraging the development of other communication skills. Communication is a fundamental human right and is essential for education, employment, healthcare, social participation, and self-determination. Without effective communication, individuals with disabilities may face barriers in learning, building relationships, accessing services, and participating in community life. AAC systems help remove these barriers by offering alternative ways to communicate. AAC systems can be classified in several ways depending on the mode of communication, the type of symbols used, and the technology involved. One common classification divides AAC systems into unaided and aided systems. Unaided AAC systems are those that do not require any external equipment or materials. These systems depend entirely on the user's body to communicate. Examples include natural gestures, facial expressions, eye gaze, body movements, manual signs, and sign languages. Since no equipment is required, these methods are portable, readily available, and cost-effective. However, successful communication depends on both the communicator and the communication partner understanding the gestures or signs being used. Aided AAC systems require the use of external materials or devices. These systems provide visual, tactile, or auditory support to facilitate communication. Aided AAC systems are further classified into low-tech, mid-tech, and high-tech systems. Low-tech AAC systems are simple communication aids that do not require electricity or batteries. Examples include communication boards, picture cards, symbol charts, alphabet boards, written messages, communication books, visual schedules, and objects of reference. These systems are affordable, easy to prepare, durable, and suitable for many educational and community settings. However, they may have limitations in vocabulary size and communication speed. Mid-tech AAC systems involve battery-operated devices with limited speech