Access matrix 2026-10-13
An authorization table with subjects or protection domains as rows, objects as columns, and sets of allowed operations as entries. An access control list stores an object column; a capability list stores a subject row. This representation is not a numerical linear map and has no ordinary floating-point matrix inverse.
// Destination: computer-science.bigb
Unix 2026-10-13
An operating-system family with process, file and pipe abstractions. The traditional discretionary file-permission model separates owner, group and other users and read, write and execute rights. Individual Unix systems can add richer access control lists and other protection mechanisms.
// Destination: computer-science.bigb
Windows XP 2026-10-13
A member of the Windows NT operating-system family. Executive services such as object, memory and input-output management execute in privileged kernel mode. Its object-level access control lists and subject tokens permit finer authorization policies than traditional owner-group-other file permissions.
// Destination: computer-science.bigb