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</html><thumbnail_url>https://akpersintang.ac.id/blog/wp-content/uploads/2026/02/sejarah-osis-singkat-768x432.png</thumbnail_url><thumbnail_width>600</thumbnail_width><thumbnail_height>338</thumbnail_height><description>Setiap siswa sekolah menengah pasti akrab dengan nama OSIS. Organisasi Siswa Intra Sekolah ini bukan sekadar wadah untuk menyalurkan minat dan bakat, melainkan juga pilar penting dalam pembentukan karakter dan kepemimpinan di kalangan pelajar. Keberadaannya seringkali dianggap biasa, namun di balik setiap kegiatan dan programnya, tersimpan sejarah panjang serta evolusi yang menarik, mencerminkan dinamika sosial &hellip;</description></oembed>
