The design of the three-tier client server architecture is a further development than before that uses two tiers. The planning is the initial stage before the implementation of the system that is already running today. With this model it is expected that the application no longer need to be installed on every client but enough on the server only.  Beside that, this model of server side application can be accessed by every client in various operating system infrastructure and hardware. The Library transaction service workload can be dispersed and no longer overlap at one work terminal only, but it can already be spread over other terminals, which is the benefit of this technology.  The integrated information system between the academic information system and library information system makes the data more accurate and well distributed. The credibility and flexibility of data is maintained due to the synchronization between servers for data usage on the main server. This kind of model system development pattern makes integration between parts of an organization better. Three tiers have a database layer on server 1, the application layer on server 2, and Layer 3 is on the user side.

The lecture attendance application at the University of Muhammadiyah Bengkulu needs to be developed so that it is easier in the implementation process. One way to simplify the process is to use the presence of a Quick Response Code which can be done in online or offline lectures. The method used is in the form of encrypted and hashed Uniform Resource Locator storage combined with internet protocol address filtering so that the information stored in the Quick Response Code becomes more secure than in plain text. The data collection method uses observation and interview techniques to previous application users and then analysis, design and experimental programming are carried out on program modules that play a role in the presence process. From the results of this study, the Quick Response Code can be protected and used successfully and can be integrated with several learning management systems, social media applications that are often used by lecturers, especially at the University of Muhammadiyah Bengkulu. The results of this study have been used in the lecture process in the Even Semester of the 2020 Academic Year.

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The problem faced by schools in managing grant funds or school Operational Assistance is that there is often a confusion of information related to fund management, from planning, budgeting and reporting processes, the school is often confused when facing challenges due to misinformation, there is no source of validated questions and answers and integrated schools can be trusted to answer school confusion regarding the management of BOS funds, the existing question and answer channels (Whatshap, telegram) are still not integrated, have not been verified and tracked, the process of finding answers that are not well communicated adds to the administrative burden of educators, Not yet available application to help teachers and students in the teaching and learning process. Service activities in the form of socialization, practice, question and answer and Focus Group Discussion related to the use of digital platforms aimed at reducing complexity, increasing efficiency, adding inspiration, and customized approaches related to the School Resource Platform, the Merdeka Teaching Platform and the Teacher: Learning Platform. This community service process can be expected so that participants as the Assistance Team from Higher Education are able to: 1) Explore the Merdeka Mengajar Platform and its various products from their Android-based devices / devices (including web-based information systems via computers, desktops or laptops) 2) Explain the functions and the benefits of the Teaching Device Product on the Merdeka Mengajar Platform 3) Explaining the functions and benefits of the Student Assessment Product on the Merdeka Mengajar Platform 4) To teachers as the main users of the Merdeka Mengajar Platform (and its various products) as well as other key users such as school principals and stakeholders other related activities and need ongoing activities because most participants still need other training to help the learning process lead to a digital system, online-based and independent learning.

Allof countriesinthe world,includingIndonesia faced the Covid-19 pandemicorthecoronavirusatthebeginning of2020.Thisvirus isknownthat firstappearedinHubeiProvince,WuhanCity,ChinaattheendofDecember 2019.The riskofCovid-19transmissioncanbe avoidedwithpublic discipline by reducingactivitiesinthemiddleofa crowdifthere isnoneedandimplementing healthprotocols.Thedevelopmentofinformationtechnology makeiteasierfor peopletoeasily obtaindatathattendstoberedundantandclassificationactivities thatcarriedout by humansstillhavelimitations,especially thehumanability to accommodatedata tobe classified.The amountof datathatentersaninstitutionor organizationevery day,thelongerthemoreitwillbe,thepileofdatawillbe accumulatedsothattheutilizationisnotoptimal.Thisstudy aimedtobuiltthethe classificationofcovid-19databy usingtheC4.5AlgorithminthecityofPagar AlamwiththeCRIPS-DMmethodwiththeX-crossvalidationopratorsmodel. TheresultsobtainedintestingbyapplyingtheC4.5algorithmtotheCovid-19 dataforthecity ofPagarAlamshowthattheaccuracyresultsare86.67%andthe AUC (Optimise) resultsare0.989.