Όλοι έχουμε διαπιστώσει ότι η πληροφορική ξεπερνάει με ταχύτατους ρυθμούς τις μονάδες μέτρησης. Συνεπώς το να ξεπεράσει το την μονάδα μέτρησης Terabyte είναι απλώς θέμα μερικών ετών. Ένα εύλογο ερώτημα είναι τι ακολουθεί μετά το Terabyte. Για να απαντήσω σε όσους είχαν αυτήν την απορία μαζί με εμένα, παρουσιάζω παρακάτω τα μετρικά συστήματα που ακολουθούν μετά το Terabyte καθώς και τις ισοτιμίες τους.

Terabyte

ακολουθεί το

Petabyte

μετά είναι το

Exabyte,

Zettabyte και

Yottabyte

Οι ισοτιμίες τους φαίνονται στην παρακάτω λίστα

Megabyte = 1/1152921504606846976 yottabyte
= 1/1125899906842624 zettabyte
= 1/1099511627776 exabyte
= 1/1073741824 petabyte
= 1/1048576 terabyte
= 1/1024 gigabyte
= 1 megabyte
= 8 Megabits
= 1024 kilobytes
= 8192 Kilobits
= 1048576 bytes
= 2097152 nibbles
= 8388608 bits

gigabyte = 1/1125899906842624 yottabyte
= 1/1099511627776 zettabyte
= 1/1073741824 exabyte
= 1/1048576 petabyte
= 1/1024 terabyte
= 1 gigabyte
= 1024 megabytes
= 8192 Megabits
= 1048576 kilobytes
= 8388608 Kilobits
= 1073741824 bytes
= 2147483648 nibbles
= 8589934592 bits

terabyte = 1/1099511627776 yottabyte
= 1/1073741824 zettabyte
= 1/1048576 exabyte
= 1/1024 petabyte
= 1 terabyte
= 1024 gigabytes
= 1048576 megabytes
= 8388608 Megabits
= 1073741824 kilobytes
= 8589934592 Kilobits
= 1099511627776 bytes
= 2199023255552 nibbles
= 8796093022208 bits

petabyte = 1/1073741824 yottabyte
= 1/1048576 zettabyte
= 1/1024 exabyte
= 1 petabyte
= 1024 terabytes
= 1048576 gigabytes
= 1073741824 megabytes
= 8589934592 Megabits
= 1099511627776 kilobytes
= 8796093022208 Kilobits
= 1125899906842624 bytes
= 2251799813685248 nibbles
= 9007199254740992 bits

Exabyte = 1/1048576 yottabyte
= 1/1024 zettabyte
= 1 exabyte
= 1024 petabytes
= 1048576 terabytes
= 1073741824 gigabytes
= 1099511627776 megabytes
= 8796093022208 Megabits
= 1125899906842624 kilobytes
= 9007199254740992 Kilobits
= 1152921504606846976 bytes
= 2305843009213693952 nibbles
= 9223372036854775808 bits

Zettabyte = 1/1024 yottabyte
= 1 zettabyte
= 1024 exabytes
= 1048576 petabytes
= 1073741824 terabytes
= 1099511627776 gigabytes
= 1125899906842624 megabytes
= 9007199254740992 Megabits
= 1152921504606846976 kilobytes
= 9223372036854775808 Kilobits
= 1180591620717411303424 bytes
= 2361183241434822606848 nibbles
= 9444732965739290427392 bits

yottabyte = 1 yottabyte
= 1024 zettabytes
= 1048576 exabytes
= 1073741824 petabytes
= 1099511627776 terabytes
= 1125899906842624 gigabytes
= 1152921504606846976 megabytes
= 9223372036854775808 Megabits
= 1180591620717411303424 kilobytes
= 9444732965739290427392 Kilobits
= 1208925819614629174706176 bytes
= 2417851639229258349412352 nibbles
= 9671406556917033397649408 bits

πηγή: http://lists.apple.com/archives/dvdlist/2001/Apr/msg00231.html

An interesting article caught my eye at jobstractor.com — the programming language trends review. The company analyzed more than 60,000 job vacancies during 2012 to produce a chart of the most sought-after technologies:

Despite developer complaints, demand for PHP and Java (server/Android) remains strong. You would also expect those jobs to require some SQL knowledge although that has a strong showing in its own right. ActionScript is a dying art so it’s rapidly falling off the chart.

But there are a number of surprises:

• Even if we combine ASP.NET and C# figures, why is Microsoft’s technology stack so low?
• Why is Objective C demand almost double that of Android when iOS devices are less popular?
• Why is JavaScript relatively low given all the HTML5 hype?

Part of this can be explained if we look at the relative changes in demand from the beginning of 2012 to the end:

JavaScript demand has increased faster than any other language. iOS and Android have also increased at an identical rate. PHP and Java jobs are decreasing in relation to trendier languages such as Ruby.

Before you make too many judgments, consider how this data is collated. Jobs Tractor searches Twitter for developer jobs so results may be skewed. For example, I suspect Twitter is used by more web start-ups than blue-chip corporations — this could partly explain the lower .NET figures.

In addition, there can be significant regional differences. Ruby skills are highly-prized in Australia but less well-known in the UK.

If you were expecting this article to recommend the most lucrative language of 2013 you’ll be disappointed. This is the only fact you need learn:

Never use job vacancy statistics as a reason for learning a language!

If demand for a particular technology is low, fewer developers are willing to learn it and the market adjusts accordingly. QBasic and COBOL developers may earn more than Objective C colleagues because their skills are increasingly rare!

Ultimately, pick technologies which interest you and never stop learning. Programming skills are always transferable and it’ll make you a better candidate when a suitable job eventually arises.

Source: http://www.sitepoint.com/best-programming-language-of-2013/