On March 13, other new cases of 35 people who were confirmed positive for Covid-19 were reported. Since then, the number of positive cases has continued to increase every day, with the total daily cases ranging from 200 to 400 new cases. This led the government to strictly implement a National Lockdown in Indonesia [7], [8]. The determination of Covid-19 as a global health emergency led the Indonesian government to issue Presidential Decree of the Republic of Indonesia Number 99 of 2020 concerning the Procurement of Vaccinations for Combating the Corona Virus Diseases (Covid-19) Pandemic which was officially announced by the President of

Mastery of information technology is very important for a teacher in learning activities at school. One of the supporting factors for improving the quality of learning is mastering the skills of utilizing online learning system applications. The goal to be achieved in this activity is to transfer science and technology by conducting training activities on the application of online learning system applications for teachers at SMA Negeri 4 Palopo. The method of implementing training activities on the application of online learning system applications at SMA Negeri 4 Palopo is by applying lecture and practice methods. The stages are: teachers are given an understanding as well as an introduction to the online learning system application, provide training on the use of zoom, Classroom, and Quiziz applications to teachers, provide assistance for teachers in the context of implementing online learning system applications at school so that the learning process becomes quality. The results of the PKM program activities entitled "Training on the Application of Online Learning System Applications at SMA Negeri 4 Palopo" were able to improve teacher skills in using online learning system applications so as to improve the quality of learning at school. Based on the training program that has been carried out, it can be concluded that the implementation of the training went smoothly and received a positive response from the teacher as a very good trainee and has been skilled in using online learning system applications such as: Zoom, Classroom, and Quiziz.

The shortage of edible oil has caused the price of oil to be significantly higher than normal, which has led to higher oil prices even in certain regions where there are no edible oil inventories at all (empty warehouses). Due to the phenomenon of cooking oil shortages, many traders sell at high prices using correlation techniques, but they are not suitable. Given so many incidents where traders were selling cooking oil with related technology but not suited to consumers' needs, the authors became interested in analyzing the data connections by applying the a priori algorithm so that the goods paired with the cooking oil were not more useless and can be beneficial to buyers. Transaction data as a reference by a correlation by setting a cut-off value of 15% resulting from scanned transaction data, when buying cooking oil, often from 210 samples at the same time, and the samples taken have too good a number to be used as a correlation to become as they have a leverage value > 1.00 so that they can be used as a reference to arrange the cooking oil supply packaging along with other items.