Category IT

Formal Language

A formal grammar is a specific set of rules to be followed by a language. A well-formed language is a language that follows a formal grammar. A formal language consists of words whose letters are taken from an alphabet and…

Software Estimation

This post is a introduction to software estimation. This is reviewed in CSSTIAE topic 2022.99. Software Estimation Methods Estimation methods and models featured on this post: LOC Lines of Code (LOC) It can be considered a size estimation method. COCOMO…

Filesystem Hierarchy Standard

The filesystem hierarchy standard (FHS) is a filesystem standard that is used in most Unix-like OS, most notably Linux. It is maintained by the Linux Foundation. Examples of Unix-like OSs not using FHS intentionally are GoboLinux and NixOS. Booting /boot…

Data Migration

You can read this data migration. Data Migration Types Data migration types: Refronting Refronting means updating or redesigning the user interface (UI) of an application while keeping the backend largely unchanged. Replacing Replacing means substituting an existing system or application…

Hard Disk Drive Storage

Hard disk drive (HDD) Cylinder skew Example to calculate a cylinder skew. Interleaving means not leaving all sections contiguously and add some skip. Disk interleaving at Wikipedia Disk Arm Scheduling Algorithms The hard disk controller selects the disk arm scheduling…

CCN-CERT

CCN-CERT is an organization that belongs to the Spain public sector. CCN está constituido de acuerdo al 421 El CCN-CSIRT está regulado en el RDL 12 Niveles de peligrosidad de ciberincidentes del CCN-CERT Niveles de impacto potencial de peligrosidad de…

Barcodes

This post is about barcodes. Barcode Formats Barcode Formats: Difference between FNC1 GS field delimiters Barcodes in Industries Linear barcodes used in press

Audio Coding Format

Audio coding formats featured on this post: G.723.1 G.723.1: used for internet audio. G.711 G.711 has higher audio quality than G.723.1. G.728 G.728 is an ITU-T standard for speech coding, being the the one that takes more bandwidth. G.728A has…