Linear Barcode (1D) Types

Symbology	Continuous or discrete	Bar widths	Uses
U.P.C.	Continuous	Many	Worldwide retail, GS1-approved – International Standard ISO/IEC 15420
Codabar	Discrete	Two	Old format used in libraries and blood banks and on airbills (out of date)
Code 25 – Non-interleaved 2 of 5	Continuous	Two	Industrial
Code 25 – Interleaved 2 of 5	Continuous	Two	Wholesale, libraries International standard ISO/IEC 16390
Code 39	Discrete	Two	Various – international standard ISO/IEC 16388
Code 93	Continuous	Many	Various
Code 128	Continuous	Many	Various – International Standard ISO/IEC 15417
Code 128A	Continuous	Many	Various – only a CODE 128 character set, not an own symbology
Code 128B	Continuous	Many	Various – only a CODE 128 character set, not an own symbology
Code 128C	Continuous	Many	Various – only a CODE 128 character set, not an own symbology
Code 11	Discrete	Two	Telephones (out of date)
CPC Binary	Discrete	Two
DUN 14	Continuous	Many	Various
EAN 2	Continuous	Many	Addon code (magazines), GS1-approved – not an own symbology – to be used only with an EAN/UPC according to ISO/IEC 15420
EAN 5	Continuous	Many	Addon code (books), GS1-approved – not an own symbology – to be used only with an EAN/UPC according to ISO/IEC 15420
EAN-8, EAN-13	Continuous	Many	Worldwide retail, GS1-approved – International Standard ISO/IEC 15420
Facing Identification Mark	Continuous	One	USPS business reply mail
GS1-128 (formerly named UCC/EAN-128), incorrectly referenced as EAN 128 and UCC 128	Continuous	Many	various, GS1-approved -is just an application of the Code 128 (ISO/IEC 15417) using the ANS MH10.8.2 AI Datastructures. Its not an own symbology.
GS1 DataBar, formerly Reduced Space Symbology (RSS)	Continuous	Many	Various, GS1-approved
HIBC (HIBCC Health Industry Bar Code)	Discrete	Two	Healthcare[28] – is a datastructure to be used with Code 128, Code 39 or Data Matrix
ITF-14	Continuous	Many	Non-retail packaging levels, GS1-approved – is just an Interleaved 2/5 Code (ISO/IEC 16390) with a few additional specifications, according to the GS1 General Specifications
Latent image barcode	Neither	Tall/short	Color print film
Pharmacode	Neither	Two	Pharmaceutical packaging (no international standard available)
Plessey	Continuous	Two	Catalogs, store shelves, inventory (no international standard available)
PLANET	Continuous	Tall/short	United States Postal Service (no international standard available)
POSTNET	Continuous	Tall/short	United States Postal Service (no international standard available)
Intelligent Mail barcode	Continuous	Tall/short	United States Postal Service, replaces both POSTNET and PLANET symbols (formerly namedOneCode)
MSI	Continuous	Two	Used for warehouse shelves and inventory
PostBar	Discrete	Many	Canadian Post office
RM4SCC / KIX	Continuous	Tall/short	Royal Mail / Royal TPG Post
JAN	Continuous	Many	Used in Japan, similar and compatible with EAN-13 (ISO/IEC 15420)
Telepen	Continuous	Two	Libraries (UK)

Source: Wikipedia