FOSS
Free and open-source software (FOSS) is software that is available under a license that grants the right to use, modify, and distribute the software, modified or not, to everyone. The public availability of the source code is, therefore, a necessary but not sufficient condition. FOSS is an inclusive umbrella term for free software and open-source software. FOSS is in contrast to proprietary software, where the software is under restrictive copyright or licensing and the source code is hidden from the users.
FOSS maintains the software user’s civil liberty rights via the “Four Essential Freedoms” of free software. Other benefits of using FOSS include decreased software costs, increased security against malware, stability, privacy, opportunities for educational usage, and giving users more control over their own hardware. Free and open-source operating systems such as Linux and descendants of BSD are widely used today, powering millions of servers, desktops, smartphones, and other devices. Free-software licenses and open-source licenses are used by many software packages today. The free software movement and the open-source software movement are online social movements behind widespread production, adoption and promotion of FOSS, with the former preferring to use the terms FLOSS, free or libre.
Admin
Admin, short for administrator and also known as IT administrator, system administrator or sysadmin, is a person who is responsible for the upkeep, configuration, and reliable operation of computer systems, especially multi-user computers, such as servers. The system administrator seeks to ensure that the uptime, performance, resources, and security of the computers they manage meet the needs of the users, without exceeding a set budget when doing so.
To meet these needs, a system administrator may acquire, install, or upgrade computer components and software; provide routine automation; maintain security policies; troubleshoot; train or supervise staff; or offer technical support for projects.
MSP
An organization responsible for managing and delivering services to another organization as per their requirement is called a managed service provider (MSP). The services provided by an MSP typically are ongoing and remote. Traditionally, an MSP was used to manage or deliver information technology (IT) services like infrastructure, security, networking and applications. But a modern-day managed service provider may also manage an organization’s other business needs, such as staffing, payroll, customer engagement and vendor management.