Observation consists of receiving knowledge of the outside world through our senses, or recording information using scientific tools and instruments. Any data recorded during an experiment can be called an observation.bservation consists of receiving knowledge of the outside world through our senses, or recording information using scientific tools and instruments. Any data recorded during an experiment can be called an observation.
A barcode scanner is a device that is used to read the printed barcodes. A barcode consists of a series of parallel, adjacent bars and spaces that are decoded with the intensity of the light reflected by them. When the scanning is initialized, the scanner lens reads the entire code with the help of the light source and converts the code into 0s and 1s.
most barcode scanners have the ability to read code 128 barcodes by default such as the idautomation usb barcode scanner this scanner dependably reads the idautomation code 128 barcode font and universal barcode font when printed as small as 6 points which is an x dimension of 4 milsymbol size according to gs1 128 specifications the height of the barcode should be 15 % of the length or 0 50 inch 1 3 cm whichever is greater the x dimension may range from 10 mils 025 cm to 40 mils 1 cm