User interface designers usually differentiate between which interface, search or browse, is better suited for a particular task with the terms “recall” and “recognition,” referring to what is going on in the user’s mind. If the user is relying on recall, they are able to proactively retrieve what it is they want out of their memory. For instance, the traditional command line, is a recall, or search (with tab completion), based interface. In contrast, if the user is relying on recognition, they need to be able to see particular terms or objects on the screen before they are able to make a decision on what to do next. For instance, the standard GUI is fundamentally a recognition, or browse-based interface.

Often people focus more on the examples given than the fundamentally different aspects of the two types of interfaces, and assume that one type of UI is better than the other:

I used to use the command line, but then the GUI became popular, I hate remembering stuff, browse is better! Recognition beats recall!

I used to use the Yahoo Directory to find stuff on the Web, but then Google came out, I can quickly get to stuff, search is superior! Fast beats slow!

Or, in the case of the Firefox UI: I used to use the bookmarks sidebar to access things, but now I just use the awesome bar, it’s so much faster, search is the future!

But battling the different interface examples against each other somewhat misses the point.  It isn’t about which interface, search or browse, is better than the other, it’s about which is a better match for the user’s particular task, and which is a better match for the user’s mind.  So it is critical to provide the user with both, and to make sure that both are extremely well designed. The Web browser UI has a lot of useful core controls for browsing information, a home control to take you back to the beginning, back and forward to explore a timeline of recent navigation, and a location bar lets you jump directly to an entirely new destination.  These controls could be really useful for browsing history and bookmarks, in addition to browsing Web pages.  So I believe we should fully integrate bookmarks and history into the Web browser interface.

• Face
• Fingerprint
• Palm scan
• Iris scan
• DNA

Behavioural

• Keystroke
• Signature
• Voice

Other identification methods include vain patterns or their signatures, recognizing heart beats, 3d face recognition.

Iris patterns a unique to each individual as our facial details. Currently we are in the phase where the database is been created. At present, it is used mostly in airports and hospitals however I think it will be a gradual rollout of the biometrics system.

In few years time, I think people would start using biometrics systems just beyond criminal justice system.

Handprints are also different for each individual along side of the figure prints. The machine records the vain and arteries in your hand that is another means of confirming you are who you say you are. The latest recognition tool that is in research is to identify individual by recognizing their walk pattern

Also, I think you walk a fine line around equating emergence with intelligence. I haven’t made that equation. What I have said, and what you might have misinterpreted, is: As far as we know, “intelligence” is an emergent quality and emergence appears on all levels of existence that we can perceive.Perhaps you mistakenly extended the subset to being the full set. That I haven’t said or implied. After all, how can two humans have a discussion about something that is defined as being beyond their comprehension, and thus beyond their conversational ability. It’s called thinking in the abstract which is not beyond human comprehension or conversational ability but we’re the model for intelligence (at least until we find something else that’s smart) and so to qualify as “intelligent” it will necessarily exhibit some of the signs that we do.