Definite article "the"

Olá!

Gostaria de saber qual a colocação correta do artigo "the" nas frases abaixo.

_____ blogs are being used for many different purposes these days.
_____ first personal computers were very large and heavy.

Desde já, obrigada.
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Blogs are being used for many different purposes these days.
The first personal computers were very large and heavy.

[1] In the first sentence, the statement is quite generic and it does not provide any kind of specific information that could narrow down the universe of blogs being discussed. Therefore, you cannot use the definite article here.

[2] Use the with nouns modified by ranking or ordering expressions such as "the first", "the second", "the third", "the next", "the last", "the previous", "the following", "the penultimate", etc.

For more information regarding the proper usage of articles in English, visit: http://www.davidappleyard.com/english/articles.htm

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