Computing

/ˈɒk-təl/

noun — “base eight, where binary gets bundled into neat little 3-bit packets and pretends that makes life simpler.”

Octal is a positional number system with base 8, using digits 0–7. It is most commonly encountered as a compact representation of binary data, where each octal digit corresponds exactly to a group of three bits. In practice, this makes it a slightly older but still elegant sibling to hexadecimal.

The core idea is simple: binary is verbose. Octal is a compression trick.

/ˈhækər ˈkʌlʧər/

noun — “the chaotic ecosystem of curiosity, cleverness, obsession, and late-night experimentation.”

Hacker Culture refers to the social philosophy, traditions, humor, values, and creative mindset that emerged from early computing communities and evolved alongside modern technology. At its core, hacker culture celebrates exploration, technical mastery, playful experimentation, open knowledge-sharing, and the belief that systems can always be understood more deeply than their creators intended.

/ˌsɪmjʊˈleɪʃən/

noun — "the imitation of a real system over time."

/ˈdɪdʒɪtl ˈsɪgnəl ˈprəʊsɛsɪŋ/

noun — "analyzing and modifying signals with algorithms."

/ˈɒpəreɪtɪŋ ˈsɪstəm/

noun — "software that governs hardware and programs."

/ˌɛl ɑː ˈjuː/

noun — "evict the item not used for the longest time."

LRU, short for Least Recently Used, is a cache replacement and resource management policy that discards the item whose last access occurred farthest in the past when space is needed. It is based on the assumption that data accessed recently is more likely to be accessed again soon, while data not accessed for a long time is less likely to be reused. This principle aligns closely with temporal locality, a common property of real-world workloads.

/ˈmæskɪŋ/

noun — "selectively hiding or preserving bits."

Masking is the process of using a binary pattern, called a mask, to selectively manipulate, hide, or preserve specific bits within a data word or byte through bitwise operations. It is widely used in systems programming, embedded systems, digital communications, and data processing to isolate, modify, or test particular bits without affecting the remaining bits.

/ˈbɪtˌwaɪz ˌɒpəˈreɪʃənz/

noun — "manipulating individual bits in data."

Bitwise Operations are low-level computational operations that act directly on the individual bits of binary numbers or data structures. They are fundamental to systems programming, embedded systems, encryption, compression algorithms, and performance-critical applications because they provide efficient, deterministic manipulation of data at the bit level. Common operations include AND, OR, XOR, NOT, bit shifts (left and right), and rotations.

/ˈskɛdʒʊlɪŋ ˈælɡərɪðəmz/

noun — "methods to determine which task runs when."

/dɪˌtɜːrmɪˈnɪstɪk ˈsɪstəmz/

noun — "systems whose behavior is predictable by design."