.geo

.geo was a generic top-level domain proposed by SRI International to be used to associate Internet resources with geographical locations, via a system of "georegistrars" and "georegistries" with hierarchical addresses representing locations in a grid encircling the Earth. These addresses are not intended to be typed in directly by end-users (and hence are "messy" strings like acme.2e5n.10e30n.geo) but rather, would be used "behind the scenes" by software looking things up by location (possibly driven by GPS positioning in mobile devices).

A number of schemes have been proposed or implemented in an attempt to classify Internet sites geographically; many of them do not require anything special in DNS (e.g., the GeoURL initiative). The .geo proposal can, hence, be criticized as making unnecessary use of a top-level domain where it might have been implemented using subdomains elsewhere (perhaps within .arpa, the domain allocated for infrastructure lookups), or with non-DNS methods such as "meta" tags in Web sites.

Geo

GEO or Geo may refer to any of the following:

In computational & scientific use:

In commercial use:

People:

GEOS (16-bit operating system)

GEOS is a computer operating environment, graphical user interface, and suite of application software. Originally released as PC/GEOS, it runs on DOS-based, IBM PC compatible computers. The package later became GeoWorks Ensemble, then NewDeal Office, and is now Breadbox Ensemble. Versions for some handheld platforms were also released.

PC/GEOS was first created by Berkeley Softworks, who later became GeoWorks Corporation. Version 4.0 was developed in 2001 by Breadbox Computer Company, LLC, and named Breadbox Ensemble.

PC/GEOS should not be confused with the 8-bit GEOS product from the same company, which runs on the Commodore 64 and other computers using MOS 6502-compatible microprocessors.

PC/GEOS

GeoWorks Ensemble

In 1990, GeoWorks released GEOS for IBM PC compatible systems, PC/GEOS. Also called GeoWorks Ensemble, it was incompatible with the earlier 8-bit versions of GEOS for Commodore and Apple II computers, but provided numerous enhancements, including scalable fonts and multitasking even on XT and AT-class PC clones. GeoWorks saw a market opportunity to provide a graphical user interface for the 16 million older model PCs that were unable to run Microsoft Windows 2.x.

Aromatic ring current

An aromatic ring current is an effect observed in aromatic molecules such as benzene and naphthalene. If a magnetic field is directed perpendicular to the plane of the aromatic system, a ring current is induced in the delocalized π electrons of the aromatic ring. This is a direct consequence of Ampère's law; since the electrons involved are free to circulate, rather than being localized in bonds as they would be in most non-aromatic molecules, they respond much more strongly to the magnetic field.

Aromatic ring currents are relevant to NMR spectroscopy, as they dramatically influence the chemical shifts of ¹H nuclei in aromatic molecules,. The effect helps distinguish these nuclear environments and is therefore of great use in molecular structure determination. In benzene, the ring protons experience deshielding because the induced magnetic field has the same direction as the external field and their chemical shift is 7.3 ppm compared to 5.6 to the vinylic proton in cyclohexene. In contrast any proton inside the aromatic ring experiences shielding because both fields are in opposite direction. This effect can be observed in cyclooctadecanonaene ([18]annulene) with 6 inner protons at −3 ppm.