Trello is a web-based list-making application originally made by Fog Creek Software in 2011, that was spun out to form the basis of a separate company in 2014 and later sold to Atlassian in January 2017. The company is based in New York City.

Source: Trello – Wikipedia

Apache Spark™ is a unified analytics engine for large-scale data processing.

Source: Apache Spark™ – Unified Analytics Engine for Big Data

http://qqtrading.com.my/rf-wireless-433-mhz-receiver-module-rxb6

https://github.com/codingtony/udev-monitor-hotplug

https://askubuntu.com/questions/1071762/read-error-on-swap-device-ubuntu-18-04

Source: Arduino_LCD_KeyPad_Shield__SKU__DFR0009_-DFRobot

Figured bass, or thoroughbass, is a kind of musical notation in which numerals and symbols (often accidentals) indicate intervals, chords, and non-chord tones that a musician playing piano, harpsichord, organ, lute (or other instruments capable of playing chords) play in relation to the bass note that these numbers and symbols appear above or below. Figured bass is closely associated with basso continuo, a historically improvised accompaniment used in almost all genres of music in the Baroque period of Classical music (1600–1750), though rarely in modern music.

https://en.wikipedia.org/wiki/Figured_bass