Block based visual programming languages don't use lines connecting boxes to each other, which has been widely used for a long time with popular visual programm

Block based visual programming languages don't use lines connecting boxes to each other, which has been widely used for a long time with popular visual programming languages like Snap!, Scratch, Squeak eToys, Blockly, etc. Snap!: https://snap.berkeley.edu https://snap.berkeley.edu Scratch: https://scratch.mit.edu/ https://scratch.mit.edu/ Squeak eToys: http://www.squeakland.org/ http://www.squeakland.org/ Blockly: https://developers.google.com/blockly https://developers.google.com/blockly Also, spreadsheets are an extremely popular form of visual programming that has been around for a long time, which don't use lines to connect boxes either. VisiCalc: https://en.wikipedia.org/wiki/VisiCalc https://en.wikipedia.org/wiki/VisiCalc Lotus 1-2-3: https://en.wikipedia.org/wiki/Lotus_1-2-3 https://en.wikipedia.org/wiki/Lotus_1-2-3 Microsoft Excel: https://en.wikipedia.org/wiki/Microsoft_Excel https://en.wikipedia.org/wiki/Microsoft_Excel Brad Myers' paper answers the age-old argument about whether or not spreadsheets are visual programming languages: https://news.ycombinator.com/item?id=26061576 https://news.ycombinator.com/item?id=26061576