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WhatsApp (officially WhatsApp Messenger) is an instant messaging (IM) and voice-over-IP (VoIP) service owned by technology conglomerate Meta. [13] It allows users to send text, voice messages and video messages, [14] make voice and video calls, and share images, documents, user locations, and other content.
To maintain this consistency, some abbreviations are not direct initials; for example CTE is used for "Central Expressway" instead of *CE, and NP is used for "Ngee Ann Polytechnic" instead of *NAP. When the Nanyang Technological University ( NTU ) was established in 1991, the name was chosen instead of the alternative "Nanyang University of ...
Site-to-site backup. backup, over the internet, to an offsite location under the user's control. Similar to remote backup except that the owner of the data maintains control of the storage location. Synthetic backup. a restorable backup image that is synthesized on the backup server from a previous full backup and all the incremental backups ...
WhatsApp introduces its document-sharing feature, initially allowing users to share PDF files with their contacts. [28] 2016: April 5: Product, Security: WhatsApp and Open Whisper Systems announce that they finish adding end-to-end encryption to "every form of communication" on WhatsApp, and that users could now verify each other's keys. [29 ...
Quadratic programming (NP-hard in some cases, P if convex) Subset sum problem [3]: SP13 Variations on the Traveling salesman problem. The problem for graphs is NP-complete if the edge lengths are assumed integers. The problem for points on the plane is NP-complete with the discretized Euclidean metric and rectilinear metric.
NP (complexity), Nondeterministic Polynomial, a computational complexity class NP-complete, a class of decision problems; NP-hard, a class of problems in computational complexity; Co-NP, a complexity class; Numpy a Python mathematical library; Named Pipe a method for Inter-Process Communications (IPC)
Backup solutions generally support differential backups and incremental backups in addition to full backups, so only material that is newer or changed compared to the backed up data is actually backed up. The effect of these is to increase significantly the speed of the backup process over slow networks while decreasing space requirements.
A reverse incremental backup method starts with a non-image full backup. After the full backup is performed, the system periodically synchronizes the full backup with the live copy, while storing the data necessary to reconstruct older versions. This can either be done using hard links—as Apple Time Machine does, or using binary diffs.