This is the 526th most frequent Indonesian word.
pdi
"PDI" is an abbreviation for "Partai Demokrasi Indonesia," meaning "Indonesian Democratic Party."
In this sentence, 'PDI' refers to a political party (Partai Demokrasi Indonesia).
PDI memiliki basis anggota yang kuat di beberapa daerah.
PDI has a strong membership base in several regions.
Here, 'PDI' again refers to the political party being discussed in a historical context.
Saya sedang membaca artikel tentang sejarah PDI.
I am reading an article about the history of PDI.
In this usage, 'PDI' is an acronym naming a specific organization carrying out programs.