HS가 무슨 의미인가요?

<p style="-webkit-text-stroke-width:0px;box-sizing:border-box;color:rgb(51, 51, 51);font-family:Pretendard, "Noto Sans KR", sans-serif;font-size:17px;font-style:normal;font-variant-caps:normal;font-variant-ligatures:normal;font-weight:400;letter-spacing:normal;margin:0px;orphans:2;padding:0px;text-align:start;text-decoration-color:initial;text-decoration-style:initial;text-decoration-thickness:initial;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-break:break-all;word-spacing:0px;">────────── <p style="-webkit-text-stroke-width:0px;box-sizing:border-box;color:rgb(51, 51, 51);font-family:Pretendard, "Noto Sans KR", sans-serif;font-size:17px;font-style:normal;font-variant-caps:normal;font-variant-ligatures:normal;font-weight:400;letter-spacing:normal;margin:0px;orphans:2;padding:0px;text-align:start;text-decoration-color:initial;text-decoration-style:initial;text-decoration-thickness:initial;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-break:break-all;word-spacing:0px;">■ HS는 <strong style="-webkit-text-stroke-width:0px;color:rgb(0, 0, 0);font-family:"Noto Sans KR";font-size:medium;font-style:normal;font-variant-caps:normal;font-variant-ligatures:normal;letter-spacing:normal;orphans:2;text-align:start;text-decoration-color:initial;text-decoration-style:initial;text-decoration-thickness:initial;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;">최상위권을 의미하는 러셀의 고유 명칭 입니다. <p style="-webkit-text-stroke-width:0px;box-sizing:border-box;color:rgb(51, 51, 51);font-family:Pretendard, "Noto Sans KR", sans-serif;font-size:17px;font-style:normal;font-variant-caps:normal;font-variant-ligatures:normal;font-weight:400;letter-spacing:normal;margin:0px;orphans:2;padding:0px;text-align:start;text-decoration-color:initial;text-decoration-style:initial;text-decoration-thickness:initial;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-break:break-all;word-spacing:0px;">────────── HS반은 일반 전형과 달리 단과 수강 시수와 무관하게 자습관 이용료 일부 또는 전액이 지원되는 등 별도의 혜택이 적용됩니다. 반대로 주간 의무등원일수도 정해져 있으니 모집요강을 통해 확인 부탁드립니다.