Information Technology

IP gets packets between hosts. TCP and UDP determine how applications exchange data between processes on those hosts. OSNTC.014 continues the Open Source Networking Technician Certification after OSNTC.013: Router Basics. Routers forward IP packets between networks; transport protocols add application-facing communication through port numbers, sequencing, acknowledgements, flow behavior, and datagram delivery. The transport-layer model application…

Commodity money emerges when a good is valued not only for immediate use, but also because it is widely accepted in exchange. Some goods perform this role better than others because their physical and economic properties reduce the friction of trade. OSHistory.002 continues the History of Money, Technology & Bitcoin sequence after OSHistory.001: The Coincidence…

Firmware engineering begins where software meets silicon: the processor executes instructions, memory maps define what addresses mean, registers expose hardware state, and interrupts let external events redirect execution. This is OSFEC.001, the first lesson in the Open Source Firmware Engineer Certification track. It builds on OSFTC.001: Firmware Images, Safe Flashing, Bootloaders, and Recovery Basics and…

Firmware service is controlled change on hardware that can become unusable if the wrong image, wrong target, interrupted write, incompatible configuration, or failed recovery path is handled badly. This is OSFTC.001, the first lesson in the Open Source Firmware Technician Certification track. It establishes the field workflow for identifying firmware, backing up what matters, validating…

A fiber link is not engineered by asking whether light reaches the far end. It is engineered by proving that the receiver gets enough optical power under worst-case conditions—without being overloaded—and that enough margin remains for aging, contamination, repair, measurement uncertainty, and real-world variation. This is OSFOEC.001, the first lesson in the Open Source Fiber…

Fiber optic work is precision work: eye protection, glass-scrap control, optical-source awareness, bend-limit discipline, and clean connector endfaces are fundamental safety and reliability requirements. This is OSFOTC.001, the first lesson in the Open Source Fiber Optics Technician Certification track. It establishes the habits that every later lesson depends on: safe handling, connector discipline, inspection, cleaning,…

Data-center reliability is not created by buying “extra equipment.” It is created by making sure the critical load can survive the exact failures and maintenance states the business requires. This is OSDCEC.001, the first lesson in the Open Source Data Center Engineer Certification track. It builds directly on OSDCTC.001: Data Center Floor Fundamentals and moves…

Start the Open Source Data Center Technician track with the physical fundamentals of a data center floor: racks, power paths, cooling, network cabling, switches, redundancy, alarms, safety, and technician troubleshooting.

A robotics technician’s first job is not making the robot move. It is knowing when the robot must not move, what can still move after a stop, and what conditions must be proven before a person enters the hazardous space. This is OSRTC.001, the first lesson in the Open Source Robotics Technician Certification track. It…

Learn the engineering foundations of robot motion: coordinate frames, joint space, task space, homogeneous transforms, forward kinematics, inverse kinematics, TCPs, singularities, and practical fault isolation.

Semiconductor engineering starts with one idea: electrical behavior can be designed by controlling which energy states electrons can occupy and how many mobile charge carriers exist. This is OSSEC.001, the first lesson in the Open Source Semiconductor Engineer Certification track. It builds on the technician-level cleanroom and ESD foundation from OSSTC.001 and moves into the…