Module 2. The Beauty of Codes Flashcards
symbolic way to represent information
code
in qualitative inquiry, a code is most often a __ or a __ __
- word
- short phrase
Seven (7) Roman numeral symbols that have a fixed integer value
I, V, X, L, C, D, M
Used by ancient Egyptians in their writing system
hieroglyphics (or sacred writings)
- basically a logographic system
- one of the world’s great writing systems
Chinese writing
each graph or character corresponds to one meaningful unit of the language, not directly to a unit of thought
logographic
number system that uses only two values to represent codes and data
binary system
two values of the binary system
0,1 : off, on
binary system is the foundation on which __ __ is built
digital technology
How do you convert a decimal number to binary
Remainder method
MSB
Most significant bit
Where is the MSB located
Bottom
LSB
Least significant bit
Where is the LSB located
Top
An optical, machine-readable, representation of data
Barcode
How do traditional barcodes systematically represent data
Varying widths and spacings of parallel lines
Traditional barcodes may be referred to as
Linear or one-dimensional (1D)
Two-dimensional variants of barcodes were developed using what kind of patterns
- Rectangles
- Dots
- Hexagons
- Other geometric patterns
Two-dimensional variants of barcodes are called
Matrix codes or 2D barcodes
Initially, barcodes were scanned by what
barcode readers (special optical scanners)
Who invented barcodes
- Norman Joseph Woodland
- Bernard Silver
When was the barcode patented
1952 in the United States
Task that barcodes became almost universal
Automate supermarket checkout systems
The use of barcodes spread to many other tasks that are generically referred to as
Automatic Identification and Data Capture (AIDC)
