Occupation Health and Safety (OHS) has a purpose to ensure a safe and healthy work environment. Occupation health and safety must be apllied by an industry that have potential hazards arising from the production process carried out. The potential hazards include work accident such as explosion, fire, pollution, and disease. The technological development brought us to the next level of invention. One of the invention that found in 21st century is Augmented Reality. Augmented Reality is an revolutionaty invention which combines virtual object into reality environment. Augmented Reality widely used as a learning media, promotional tools, and for some special purpose. Augmented Reality can be use in desktop, mobile device, and wearable technology. The purpose of this research is to build Occupational Health and Safety learning media based on Augmented Reality. The learning media will be made mobile based with android devices. The method of software development using the waterfall method. The output of this research is marker card that can display objects in the form of images about Occupation Health and Safety. Images will reveal if card scanned using android mobile device that has the Augmented Reality application installed.

The growth of children in kindergarten is crucial for developing their thinking patterns and creativity. Gadgets can influence children's cognitive and literacy abilities, so a cognitive game is needed to help improve these skills. The development of the game uses VAK and IMSDD methods to improve cognitive abilities and literacy better than conventional learning. The alpha testing showed that more than 90% of respondents agreed that the SITEKA game application met their needs and increased children's concentration and learning effectiveness by over 40%

The computer-assisted test or what is usually called the CAT is a test whose main media use is a computer and the internet. The CAT system is the same as the test in general, it's just that the difference is the media used. If usually the CAT test still uses paper, then in this system this is no longer needed. SMK Muhammadiyah 2 Moyudan is located at Ngentak , Sumberagung , Kec . Moyudan , Sleman Regency, Special Region of Yogyakarta 55563. The process of accepting students majoring in multimedia tests that are still carried out manually, namely using paper and other writing instruments, certainly takes a long time. The purpose of this study is to design a CAT system so that the tests carried out can be efficient and the resulting values can be obtained in real-time. This system is designed using the Laravel framework. PHP and MySQL databases are the programming languages used in this study.