Pada penelitian ini dirancang sistem pakar berbasis web dengan menggunakan metode naïve bayes yang dimaksudkan membantu petani dalam mendiagnosa tanaman cabai. Metode dalam pengembangan sistem yang dipakai adalah extreme programming yang terdiri dari planning, design, coding, testing. Sistem pakar diagnosa penyakit tanaman cabai berbasis cabai berbasis web dikembangkan dengan menggunakan bahasa pemograman PHP dan MySQL. Sistem pakar ini mampu melakukan diagnosa tanaman cabai dengan mengajukan gejala-gejala penyakit pada saat pemeriksaan. Berdasarkan gejala-gejala yang dipilih tersebut, sistem ini akan memberikan hasil diagnosa kemudian akan menampilkan penyakit serta solusi dari penyakit tanaman cabai tersebut. Hasil dalam penelitian ini menyimpulkan bahwa terdapat kesesuaian hasil diagnosis sistem pakar menggunakan metode naïve bayes dengan pakar.

Mailing is one of the Web systems that is now widely used in modern administrative systems. The correspondence system is a system related to administration that virtually concentrates the components of an organization, where data, information, and communication are made through telecommunication media with the aim of building a system that is able to accommodate each element. This correspondence system is built using the SDLC (Software Development Life Cycle) method with the Waterfall Model software development technique. For the use of the correspondence system, a study was conducted entitled "Web-Based Correspondence System at the Bale Musara Village Office". This research uses quantitative research methods. The results of testing the Web-based Correspondence System are in accordance with the system proposed and expected by system users, especially for village operators and secretaries. Based on the research and creation of the system that has been carried out, there are several conclusions, namely the Making of a Correspondence Information System at the Bale Musara Village Office can be used to facilitate the work of village officials.

Field Work Practice is a training facility for informatics engineering students to develop, implement and answer problems faced by their environment. The problem that occurs is where the management and data collection of student data is still carried out semi-systemically because it is recorded in a spreadsheet application so that the data is not structured properly, as a result, information from the placement/assignment process, reporting, and classification of PKL student data is less relevant, accurate and timely. and sometimes human error occurs. Therefore we need a system that is able to make it easier to manage student data from street vendors participants into relevant, accurate and timely information when needed entitled "Web-Based Field Work Practice Information System (PKL). This system is built using the CodeIgniter framework and CSS Layout Bootstrap, then this system will be tested through the blackbox method and compatibility testing. So that we get a system that is able to make it easier to manage student data from street vendors participants into relevant, accurate and timely information when needed.